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DOE OSTI2022

Nb$_3$Sn Superconducting Radiofrequency Cavities: a Maturing Technology for Particle Accelerators and Detectors

Nb3Sn superconducting radiofrequency (SRF) cavities have substantial potential for enabling new performance capabilities for particle accelerators for high energy physics (HEP), as well as for RF cavity-based detectors for dark matter, gravitational waves, and other quantum sensing applications. Outside of HEP, Nb3Sn SRF cavities can also benefit accelerators for nuclear physics, basic energy sciences, and the industry. In this contribution to Snowmass 2021, we overview the potential, status, and outlook of Nb3Sn SRF cavities.

43 PARTICLE ACCELERATORS↗
DOE OSTI2023

Visual, Optical and Replica Inspections: Surface Preparation of 650 MHz NB Cavity for PIP-II Linac

Surface preparation of niobium superconducting RF cavities is a critical step for achieving good RF performance under the superconducting state. Surface defect, roughness, and contamination affect the accelerating gradient and quality factor of the cavities. We report surface inspection methods used to control the surface processing of 650 MHz cavities designated for the pre-production and prototype cryomodules for PIP-II linac. The cavity surface was routinely inspected visually, with an optical camera, and by microscopic scanning of surface replicas. This article covers details on the surface inspection methods and surface polishing process used to repair the surface.

43 PARTICLE ACCELERATORS↗
DOE OSTI2026

Microstructural Characterization of Nb$_3$Sn Thin Films Using FIB Tomography

The accelerating gradient of N b3Sn superconducting radiofrequency (SRF) cavities is currently limited, and the underlying cause remains an open question in the field. One leading hypothesis attributes this limitation to the presence of tin-deficient regions within the N b3Sn coating, which can suppress the superheating field. Due to the relatively large coherence length of N b3Sn, defects near the surface may significantly interact with the RF field. However, these subsurface defects have proven difficult to characterize. This research aims to investigate the structure and distribution of subsurface Sn deficient regions to better understand their influence on cavity performance. We employ focused ion beam (FIB) tomography to analyze the subsurface microstructure of N b3Sn thin films. This technique enables threedimensional reconstruction of both the tin distribution and the grain structure within the film. By correlating Sn content with grain structure, we find that Sn deficient regions are more prevalent that previously thought. However, the Sn deficient regions are consistently located below the surface of the film where RF fields are strongly attenuated by supercurrent screening and are likely not a limiting factor for cavity performance

Viklund, Eric [Fermilab]↗
DOE OSTI2026

Magneto-optical study of Nb thin films for superconducting qubits

Among the recognized sources of decoherence in superconducting qubits, the spatial inhomogeneity of the superconducting state and the possible presence of magnetic-flux vortices remain comparatively underexplored. Niobium is commonly used as a structural material in transmon qubits that host Josephson junctions, and excess dissipation anywhere in the transmon can become a bottleneck that limits overall quantum performance. The metal/substrate interfacial layer may simultaneously host pair-breaking loss channels (e.g., two-level systems, TLS) and control thermal transport, thereby affecting dissipation and temperature stability. Here, we use quantitative magneto-optical imaging of the magnetic-flux distribution to characterize the homogeneity of the superconducting state and the critical current density, $j_{c}$, in niobium films fabricated under different sputtering conditions. The imaging reveals distinct flux-penetration regimes, ranging from a nearly ideal Bean critical state to strongly nonuniform thermo-magnetic dendritic avalanches. By fitting the measured magnetic-induction profiles, we extract $j_{c}$ and correlate it with film physical properties and with measured qubit internal quality factors. Our results indicate that the Nb/Si interlayer can be a significant contributor to decoherence and should be considered an important factor that must be optimized.

Datta, Amlan [Ames Lab; Iowa State U.]↗
DOE OSTI2026

Understanding the Role of Extrinsic Impurities in Bulk Nb SRF Cavities

High gradient and high quality factor superconducting radiofrequency (SRF) cavities are essential for efficient particle acceleration in next-generation accelerators. This work demonstrates that the superconducting performance of bulk niobium can be enhanced through a controlled introduction of interstitial oxygen and nitrogen. Thermal and chemical surface treatments modify the concentration and distribution of these impurities, enabling systematic tuning of SRF cavity performance. By combining cavity RF measurements with quantitative materials characterizations, we isolate the impact of impurity concentration on BCS surface resistance and identify the mechanisms by which interstitial impurities alter the superconducting properties of niobium. We find that nitrogen is an order of magnitude more effective than oxygen in reducing BCS resistance at 16 MV/m and that the reduction arises from a combination of mean free path optimization and superconducting gap enhancement. Using these insights, we develop a predictive model that estimates cavity performance directly from room temperature sample material studies, reducing the reliance on full-scale cryogenic tests for surface treatment development. We then apply this model to explore co-doping strategies, demonstrating that combining interstitial oxygen and nitrogen achieves a synergistic reduction in BCS resistance. These results establish co-doping as a viable path for the development of surface-engineered niobium for future high quality factor SRF applications.

Hu, Hannah [Chicago U.]↗
DOE OSTI2020

Materials Data on Nb24I35Br9 by Materials Project

Nb24I35Br9 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are twenty-four inequivalent Nb sites. In the first Nb site, Nb is bonded to four I and one Br atom to form a mixture of distorted corner and edge-sharing NbI4Br square pyramids. There are a spread of Nb–I bond distances ranging from 2.90–2.94 Å. The Nb–Br bond length is 2.82 Å. In the second Nb site, Nb is bonded to four I and one Br atom to form a mixture of distorted corner and edge-sharing NbI4Br square pyramids. There are a spread of Nb–I bond distances ranging from 2.90–2.92 Å. The Nb–Br bond length is 2.84 Å. In the third Nb site, Nb is bonded to four I and one Br atom to form a mixture of distorted corner and edge-sharing NbI4Br square pyramids. There are three shorter (2.88 Å) and one longer (2.89 Å) Nb–I bond lengths. The Nb–Br bond length is 2.84 Å. In the fourth Nb site, Nb is bonded to four I and one Br atom to form a mixture of distorted corner and edge-sharing NbI4Br square pyramids. There are a spread of Nb–I bond distances ranging from 2.86–2.90 Å. The Nb–Br bond length is 2.86 Å. In the fifth Nb site, Nb is bonded to four I and one Br atom to form a mixture of distorted corner and edge-sharing NbI4Br square pyramids. There are a spread of Nb–I bond distances ranging from 2.87–2.94 Å. The Nb–Br bond length is 2.84 Å. In the sixth Nb site, Nb is bonded to four I and one Br atom to form a mixture of distorted corner and edge-sharing NbI4Br square pyramids. There are a spread of Nb–I bond distances ranging from 2.87–2.95 Å. The Nb–Br bond length is 2.86 Å. In the seventh Nb site, Nb is bonded to four I and one Br atom to form a mixture of distorted corner and edge-sharing NbI4Br square pyramids. There are a spread of Nb–I bond distances ranging from 2.86–2.94 Å. The Nb–Br bond length is 2.87 Å. In the eighth Nb site, Nb is bonded to four I and one Br atom to form a mixture of distorted corner and edge-sharing NbI4Br square pyramids. There are a spread of Nb–I bond distances ranging from 2.85–2.91 Å. The Nb–Br bond length is 2.81 Å. In the ninth Nb site, Nb is bonded to four I and one Br atom to form distorted NbI4Br square pyramids that share a cornercorner with one NbI4Br square pyramid and edges with four NbI5 square pyramids. There are a spread of Nb–I bond distances ranging from 2.88–2.92 Å. The Nb–Br bond length is 2.85 Å. In the tenth Nb site, Nb is bonded to four I and one Br atom to form distorted NbI4Br square pyramids that share a cornercorner with one NbI4Br square pyramid and edges with four NbI5 square pyramids. There are three shorter (2.88 Å) and one longer (2.91 Å) Nb–I bond lengths. The Nb–Br bond length is 2.85 Å. In the eleventh Nb site, Nb is bonded to four I and one Br atom to form distorted NbI4Br square pyramids that share a cornercorner with one NbI4Br square pyramid and edges with four NbI5 square pyramids. There are a spread of Nb–I bond distances ranging from 2.86–2.91 Å. The Nb–Br bond length is 2.80 Å. In the twelfth Nb site, Nb is bonded to four I and one Br atom to form a mixture of distorted corner and edge-sharing NbI4Br square pyramids. There are a spread of Nb–I bond distances ranging from 2.89–2.92 Å. The Nb–Br bond length is 2.85 Å. In the thirteenth Nb site, Nb is bonded to five I atoms to form distorted NbI5 square pyramids that share a cornercorner with one NbI5 square pyramid and edges with four NbI4Br square pyramids. There are a spread of Nb–I bond distances ranging from 2.87–2.97 Å. In the fourteenth Nb site, Nb is bonded to four I and one Br atom to form distorted NbI4Br square pyramids that share a cornercorner with one NbI4Br square pyramid and edges with four NbI5 square pyramids. There are a spread of Nb–I bond distances ranging from 2.88–2.92 Å. The Nb–Br bond length is 2.84 Å. In the fifteenth Nb site, Nb is bonded to four I and one Br atom to form distorted NbI4Br square pyramids that share a cornercorner with one NbI4Br square pyramid and edges with four NbI5 square pyramids. There are a spread of Nb–I bond distances ranging from 2.86–2.92 Å. The Nb–Br bond length is 2.81 Å. In the sixteenth Nb site, Nb is bonded to four I and one Br atom to form distorted NbI4Br square pyramids that share a cornercorner with one NbI4Br square pyramid and edges with four NbI5 square pyramids. There are a spread of Nb–I bond distances ranging from 2.86–2.91 Å. The Nb–Br bond length is 2.83 Å. In the seventeenth Nb site, Nb is bonded to five I atoms to form distorted NbI5 square pyramids that share a cornercorner with one NbI5 square pyramid and edges with four NbI4Br square pyramids. There are a spread of Nb–I bond distances ranging from 2.87–3.02 Å. In the eighteenth Nb site, Nb is bonded to five I atoms to form distorted NbI5 square pyramids that share a cornercorner with one NbI5 square pyramid and edges with four NbI4Br square pyramids. There are a spread of Nb–I bond distances ranging from 2.85–3.01 Å. In the nineteenth Nb site, Nb is bonded to four I and one Br atom to form a mixture of distorted corner and edge-sharing NbI4Br square pyramids. There are a spread of Nb–I bond distances ranging from 2.86–2.93 Å. The Nb–Br bond length is 2.85 Å. In the twentieth Nb site, Nb is bonded to five I atoms to form distorted NbI5 square pyramids that share a cornercorner with one NbI5 square pyramid and edges with four NbI4Br square pyramids. There are a spread of Nb–I bond distances ranging from 2.86–2.99 Å. In the twenty-first Nb site, Nb is bonded to four I and one Br atom to form a mixture of distorted corner and edge-sharing NbI4Br square pyramids. There are a spread of Nb–I bond distances ranging from 2.85–2.90 Å. The Nb–Br bond length is 2.86 Å. In the twenty-second Nb site, Nb is bonded to four I and one Br atom to form a mixture of distorted corner and edge-sharing NbI4Br square pyramids. There are a spread of Nb–I bond distances ranging from 2.85–2.91 Å. The Nb–Br bond length is 2.86 Å. In the twenty-third Nb site, Nb is bonded to five I atoms to form a mixture of distorted corner and edge-sharing NbI5 square pyramids. There are a spread of Nb–I bond distances ranging from 2.88–2.98 Å. In the twenty-fourth Nb site, Nb is bonded to five I atoms to form distorted NbI5 square pyramids that share a cornercorner with one NbI5 square pyramid and edges with four NbI4Br square pyramids. There are a spread of Nb–I bond distances ranging from 2.88–2.95 Å. There are thirty-five inequivalent I sites. In the first I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the second I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the third I site, I is bonded in a 1-coordinate geometry to three Nb atoms. In the fourth I site, I is bonded in a 1-coordinate geometry to three Nb atoms. In the fifth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the sixth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the seventh I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the eighth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the ninth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the tenth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the eleventh I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the twelfth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the thirteenth I site, I is bonded in a 4-coordinate geometry to three Nb atoms. In the fourteenth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the fifteenth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the sixteenth I site, I is bonded in a 1-coordinate geometry to three Nb atoms. In the seventeenth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the eighteenth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the nineteenth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the twentieth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the twenty-first I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the twenty-second I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the twenty-third I site, I is bonded in a bent 120 degrees geometry to two Nb atoms. In the twenty-fourth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the twenty-fifth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the twenty-sixth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the twenty-seventh I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the twenty-eighth I site, I is bonded in a bent 120 degrees geometry to two Nb atoms. In the twenty-ninth I site, I is bonded in a bent 120 degrees geometry to two Nb atoms. In the thirtieth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the thirty-first I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the thirty-second I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the thirty-third I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the thirty-fourth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. In the thirty-fifth I site, I is bonded in a 3-coordinate geometry to three Nb atoms. There are nine inequivalent Br sites. In the first Br site, Br is bonded in a distorted bent 150 degrees geometry to two Nb atoms. In the second Br site, Br is bonded in a bent 120 degrees geometry to two Nb atoms. In the third Br site, Br is bonded in a bent 150 degrees geometry to two Nb atoms. In the fourth Br site, Br is bonded in a bent 150 degrees geometry to two Nb atoms. In the fifth Br site, Br is bonded in a bent 120 degrees geometry to two Nb atoms. In the sixth Br site, Br is bonded in a distorted bent 120 degrees geometry to two Nb atoms. In the seventh Br site, Br is bonded in a bent 120 degrees geometry to two Nb atoms. In the eighth Br site, Br is bonded in a bent 150 degrees geometry to two Nb atoms. In the ninth Br site, Br is bonded in a bent 150 degrees geometry to two Nb atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Nb25S48 by Materials Project

Nb25S48 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are twenty-five inequivalent Nb+3.84+ sites. In the first Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form a mixture of distorted edge and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 45°. There are a spread of Nb–S bond distances ranging from 2.49–2.56 Å. In the second Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form a mixture of distorted edge and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 12°. There are a spread of Nb–S bond distances ranging from 2.47–2.50 Å. In the third Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.47–2.52 Å. In the fourth Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form a mixture of distorted edge and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 44°. There are a spread of Nb–S bond distances ranging from 2.48–2.56 Å. In the fifth Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.48–2.51 Å. In the sixth Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.48–2.50 Å. In the seventh Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.48–2.56 Å. In the eighth Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form a mixture of distorted edge and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 11°. There are four shorter (2.48 Å) and two longer (2.49 Å) Nb–S bond lengths. In the ninth Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.47–2.53 Å. In the tenth Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.45–2.52 Å. In the eleventh Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.48–2.52 Å. In the twelfth Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form a mixture of distorted edge and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 45°. There are a spread of Nb–S bond distances ranging from 2.48–2.56 Å. In the thirteenth Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.48–2.51 Å. In the fourteenth Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.47–2.51 Å. In the fifteenth Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.48–2.51 Å. In the sixteenth Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form a mixture of distorted edge and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 13°. There are a spread of Nb–S bond distances ranging from 2.44–2.52 Å. In the seventeenth Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form a mixture of distorted edge and face-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.47–2.52 Å. In the eighteenth Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form a mixture of distorted edge and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 45°. There are a spread of Nb–S bond distances ranging from 2.48–2.54 Å. In the nineteenth Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form a mixture of distorted edge and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 45°. There are a spread of Nb–S bond distances ranging from 2.48–2.54 Å. In the twentieth Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form a mixture of edge, face, and corner-sharing NbS6 octahedra. There are a spread of Nb–S bond distances ranging from 2.42–2.64 Å. In the twenty-first Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.49–2.55 Å. In the twenty-second Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.48–2.56 Å. In the twenty-third Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form a mixture of distorted edge and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 45°. There are a spread of Nb–S bond distances ranging from 2.48–2.55 Å. In the twenty-fourth Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are two shorter (2.48 Å) and four longer (2.50 Å) Nb–S bond lengths. In the twenty-fifth Nb+3.84+ site, Nb+3.84+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.47–2.52 Å. There are forty-eight inequivalent S2- sites. In the first S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the second S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the third S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the fourth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the fifth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the sixth S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.84+ atoms. In the seventh S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.84+ atoms. In the eighth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the ninth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the tenth S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.84+ atoms. In the eleventh S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the twelfth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the thirteenth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the fourteenth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the fifteenth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the sixteenth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the seventeenth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the eighteenth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the nineteenth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the twentieth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the twenty-first S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the twenty-second S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the twenty-third S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the twenty-fourth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the twenty-fifth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the twenty-sixth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the twenty-seventh S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the twenty-eighth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the twenty-ninth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the thirtieth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the thirty-first S2- site, S2- is bonded to four Nb+3.84+ atoms to form edge-sharing SNb4 trigonal pyramids. In the thirty-second S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.84+ atoms. In the thirty-third S2- site, S2- is bonded to four Nb+3.84+ atoms to form distorted edge-sharing SNb4 trigonal pyramids. In the thirty-fourth S2- site, S2- is bonded in a rectangular see-saw-like geometry to four Nb+3.84+ atoms. In the thirty-fifth S2- site, S2- is bonded in a rectangular see-saw-like geometry to four Nb+3.84+ atoms. In the thirty-sixth S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.84+ atoms. In the thirty-seventh S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.84+ atoms. In the thirty-eighth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the thirty-ninth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the fortieth S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.84+ atoms. In the forty-first S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the forty-second S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.84+ atoms. In the forty-third S2- site, S2- is bonded to four Nb+3.84+ atoms to form distorted edge-sharing SNb4 trigonal pyramids. In the forty-fourth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the forty-fifth S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to four Nb+3.84+ atoms. In the forty-sixth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the forty-seventh S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms. In the forty-eighth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.84+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Nb24(CuS8)5 by Materials Project

Nb24(CuS8)5 crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are twenty-four inequivalent Nb+3.12+ sites. In the first Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form a mixture of distorted edge and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 46°. There are a spread of Nb–S bond distances ranging from 2.48–2.52 Å. In the second Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.48–2.53 Å. In the third Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.47–2.52 Å. In the fourth Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.48–2.51 Å. In the fifth Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.47–2.54 Å. In the sixth Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.48–2.54 Å. In the seventh Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.48–2.50 Å. In the eighth Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.47–2.52 Å. In the ninth Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form a mixture of distorted edge and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 43°. There are a spread of Nb–S bond distances ranging from 2.49–2.54 Å. In the tenth Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. There are a spread of Nb–S bond distances ranging from 2.48–2.53 Å. In the eleventh Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form a mixture of distorted face, edge, and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 48–50°. There are a spread of Nb–S bond distances ranging from 2.48–2.57 Å. In the twelfth Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form a mixture of distorted edge and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 46°. There are a spread of Nb–S bond distances ranging from 2.49–2.52 Å. In the thirteenth Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form a mixture of face, edge, and corner-sharing NbS6 octahedra. There are a spread of Nb–S bond distances ranging from 2.47–2.60 Å. In the fourteenth Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form a mixture of distorted face, edge, and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 41–45°. There are a spread of Nb–S bond distances ranging from 2.48–2.55 Å. In the fifteenth Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form a mixture of distorted face, edge, and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 41–45°. There are a spread of Nb–S bond distances ranging from 2.50–2.55 Å. In the sixteenth Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form a mixture of face, edge, and corner-sharing NbS6 octahedra. There are a spread of Nb–S bond distances ranging from 2.47–2.64 Å. In the seventeenth Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form a mixture of face, edge, and corner-sharing NbS6 octahedra. There are a spread of Nb–S bond distances ranging from 2.47–2.64 Å. In the eighteenth Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form a mixture of distorted face, edge, and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 46–48°. There are a spread of Nb–S bond distances ranging from 2.48–2.55 Å. In the nineteenth Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form a mixture of distorted face, edge, and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 46–48°. There are a spread of Nb–S bond distances ranging from 2.48–2.55 Å. In the twentieth Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form a mixture of face, edge, and corner-sharing NbS6 octahedra. There are a spread of Nb–S bond distances ranging from 2.48–2.59 Å. In the twenty-first Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form a mixture of distorted face, edge, and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 42–45°. There are a spread of Nb–S bond distances ranging from 2.48–2.52 Å. In the twenty-second Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form a mixture of distorted face, edge, and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 41–44°. There are a spread of Nb–S bond distances ranging from 2.48–2.55 Å. In the twenty-third Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form a mixture of distorted face, edge, and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 48–50°. There are a spread of Nb–S bond distances ranging from 2.48–2.57 Å. In the twenty-fourth Nb+3.12+ site, Nb+3.12+ is bonded to six S2- atoms to form a mixture of distorted edge and corner-sharing NbS6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 43°. There are a spread of Nb–S bond distances ranging from 2.48–2.56 Å. There are five inequivalent Cu1+ sites. In the first Cu1+ site, Cu1+ is bonded in a rectangular see-saw-like geometry to four S2- atoms. There are a spread of Cu–S bond distances ranging from 2.24–2.35 Å. In the second Cu1+ site, Cu1+ is bonded in a rectangular see-saw-like geometry to four S2- atoms. There are a spread of Cu–S bond distances ranging from 2.24–2.34 Å. In the third Cu1+ site, Cu1+ is bonded in a rectangular see-saw-like geometry to four S2- atoms. There are a spread of Cu–S bond distances ranging from 2.23–2.34 Å. In the fourth Cu1+ site, Cu1+ is bonded in a distorted rectangular see-saw-like geometry to four S2- atoms. There are a spread of Cu–S bond distances ranging from 2.20–2.34 Å. In the fifth Cu1+ site, Cu1+ is bonded in a distorted rectangular see-saw-like geometry to four S2- atoms. There are a spread of Cu–S bond distances ranging from 2.22–2.35 Å. There are forty inequivalent S2- sites. In the first S2- site, S2- is bonded in a 5-coordinate geometry to three Nb+3.12+ and two equivalent Cu1+ atoms. In the second S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.12+ atoms. In the third S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to three Nb+3.12+ and one Cu1+ atom. In the fourth S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.12+ atoms. In the fifth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.12+ atoms. In the sixth S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.12+ atoms. In the seventh S2- site, S2- is bonded in a 5-coordinate geometry to three Nb+3.12+ and two equivalent Cu1+ atoms. In the eighth S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.12+ atoms. In the ninth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.12+ atoms. In the tenth S2- site, S2- is bonded in a rectangular see-saw-like geometry to three Nb+3.12+ and one Cu1+ atom. In the eleventh S2- site, S2- is bonded in a rectangular see-saw-like geometry to three Nb+3.12+ and one Cu1+ atom. In the twelfth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.12+ atoms. In the thirteenth S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.12+ atoms. In the fourteenth S2- site, S2- is bonded in a 5-coordinate geometry to three Nb+3.12+ and two equivalent Cu1+ atoms. In the fifteenth S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.12+ atoms. In the sixteenth S2- site, S2- is bonded in a distorted T-shaped geometry to three Nb+3.12+ atoms. In the seventeenth S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.12+ atoms. In the eighteenth S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to three Nb+3.12+ and one Cu1+ atom. In the nineteenth S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to three Nb+3.12+ and one Cu1+ atom. In the twentieth S2- site, S2- is bonded to four Nb+3.12+ atoms to form distorted SNb4 trigonal pyramids that share a cornercorner with one SNb6 pentagonal pyramid, corners with two equivalent SNb4 trigonal pyramids, and edges with two equivalent SNb6 pentagonal pyramids. In the twenty-first S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.12+ atoms. In the twenty-second S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.12+ atoms. In the twenty-third S2- site, S2- is bonded in a 5-coordinate geometry to three Nb+3.12+ and two equivalent Cu1+ atoms. In the twenty-fourth S2- site, S2- is bonded to six Nb+3.12+ atoms to form distorted SNb6 pentagonal pyramids that share a cornercorner with one SNb6 pentagonal pyramid, edges with six SNb6 pentagonal pyramids, and edges with two equivalent SNb4 trigonal pyramids. In the twenty-fifth S2- site, S2- is bonded in a 5-coordinate geometry to five Nb+3.12+ atoms. In the twenty-sixth S2- site, S2- is bonded in a rectangular see-saw-like geometry to three Nb+3.12+ and one Cu1+ atom. In the twenty-seventh S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.12+ atoms. In the twenty-eighth S2- site, S2- is bonded to six Nb+3.12+ atoms to form a mixture of distorted edge and corner-sharing SNb6 pentagonal pyramids. In the twenty-ninth S2- site, S2- is bonded to six Nb+3.12+ atoms to form distorted SNb6 pentagonal pyramids that share corners with two equivalent SNb6 pentagonal pyramids, a cornercorner with one SNb4 trigonal pyramid, and edges with seven SNb6 pentagonal pyramids. In the thirtieth S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.12+ atoms. In the thirty-first S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to three Nb+3.12+ and one Cu1+ atom. In the thirty-second S2- site, S2- is bonded to six Nb+3.12+ atoms to form distorted SNb6 pentagonal pyramids that share corners with two equivalent SNb6 pentagonal pyramids, a cornercorner with one SNb4 trigonal pyramid, and edges with seven SNb6 pentagonal pyramids. In the thirty-third S2- site, S2- is bonded to six Nb+3.12+ atoms to form a mixture of distorted edge and corner-sharing SNb6 pentagonal pyramids. In the thirty-fourth S2- site, S2- is bonded in a 3-coordinate geometry to three Nb+3.12+ atoms. In the thirty-fifth S2- site, S2- is bonded in a 6-coordinate geometry to three Nb+3.12+ and three Cu1+ atoms. In the thirty-sixth S2- site, S2- is bonded in a 5-coordinate geometry to five Nb+3.12+ atoms. In the thirty-seventh S2- site, S2- is bonded to six Nb+3.12+ atoms to form distorted SNb6 pentagonal pyramids that share a cornercorner with one SNb6 pentagonal pyramid, edges with six SNb6 pentagonal pyramids, and edges with two equivalent SNb4 trigonal pyramids. In the thirty-eighth S2- site, S2- is bonded in a rectangular see-saw-like geometry to three Nb+3.12+ and one Cu1+ atom. In the thirty-ninth S2- site, S2- is bonded to four Nb+3.12+ atoms to form distorted SNb4 trigonal pyramids that share a cornercorner with one SNb6 pentagonal pyramid, corners with two equivalent SNb4 trigonal pyramids, and edges with two equivalent SNb6 pentagonal pyramids. In the fortieth S2- site, S2- is bonded in a distorted rectangu

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li17Nb20O60 by Materials Project

Li17Nb20O60 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are seventeen inequivalent Li sites. In the first Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.07–2.38 Å. In the second Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.05–2.35 Å. In the third Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.06–2.38 Å. In the fourth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.09–2.35 Å. In the fifth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.03–2.34 Å. In the sixth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.08–2.33 Å. In the seventh Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.09–2.35 Å. In the eighth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.09–2.34 Å. In the ninth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.08–2.34 Å. In the tenth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.09–2.34 Å. In the eleventh Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.09–2.34 Å. In the twelfth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.08–2.34 Å. In the thirteenth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.08–2.34 Å. In the fourteenth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.08–2.34 Å. In the fifteenth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.07–2.35 Å. In the sixteenth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.07–2.35 Å. In the seventeenth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.05–2.38 Å. There are twenty inequivalent Nb sites. In the first Nb site, Nb is bonded to six O atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 29–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.18 Å. In the second Nb site, Nb is bonded to six O atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 31–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.14 Å. In the third Nb site, Nb is bonded to six O atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 29–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.20 Å. In the fourth Nb site, Nb is bonded to six O atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 29–42°. There are a spread of Nb–O bond distances ranging from 1.90–2.21 Å. In the fifth Nb site, Nb is bonded to six O atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 29–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.17 Å. In the sixth Nb site, Nb is bonded to six O atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 31–41°. There are a spread of Nb–O bond distances ranging from 1.89–2.22 Å. In the seventh Nb site, Nb is bonded to six O atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 31–42°. There are a spread of Nb–O bond distances ranging from 1.90–2.14 Å. In the eighth Nb site, Nb is bonded to six O atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles are 40°. There are a spread of Nb–O bond distances ranging from 1.91–2.18 Å. In the ninth Nb site, Nb is bonded to six O atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 39–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.18 Å. In the tenth Nb site, Nb is bonded to six O atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 40–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.19 Å. In the eleventh Nb site, Nb is bonded to six O atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles are 40°. There are a spread of Nb–O bond distances ranging from 1.90–2.19 Å. In the twelfth Nb site, Nb is bonded to six O atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 40–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.19 Å. In the thirteenth Nb site, Nb is bonded to six O atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 40–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.19 Å. In the fourteenth Nb site, Nb is bonded to six O atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 40–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.19 Å. In the fifteenth Nb site, Nb is bonded to six O atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 40–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.19 Å. In the sixteenth Nb site, Nb is bonded to six O atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 40–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.19 Å. In the seventeenth Nb site, Nb is bonded to six O atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 40–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.19 Å. In the eighteenth Nb site, Nb is bonded to six O atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 30–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.19 Å. In the nineteenth Nb site, Nb is bonded to six O atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 32–41°. There are a spread of Nb–O bond distances ranging from 1.87–2.20 Å. In the twentieth Nb site, Nb is bonded to six O atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 30–41°. There are a spread of Nb–O bond distances ranging from 1.88–2.17 Å. There are sixty inequivalent O sites. In the first O site, O is bonded in a T-shaped geometry to one Li and two Nb atoms. In the second O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the third O site, O is bonded in a T-shaped geometry to one Li and two Nb atoms. In the fourth O site, O is bonded in a distorted trigonal planar geometry to one Li and two Nb atoms. In the fifth O site, O is bonded in a distorted trigonal planar geometry to one Li and two Nb atoms. In the sixth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the seventh O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the eighth O site, O is bonded in a T-shaped geometry to one Li and two Nb atoms. In the ninth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the tenth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the eleventh O site, O is bonded in a T-shaped geometry to one Li and two Nb atoms. In the twelfth O site, O is bonded in a distorted trigonal planar geometry to one Li and two Nb atoms. In the thirteenth O site, O is bonded in a distorted trigonal planar geometry to one Li and two Nb atoms. In the fourteenth O site, O is bonded in a distorted trigonal planar geometry to one Li and two Nb atoms. In the fifteenth O site, O is bonded in a distorted trigonal planar geometry to one Li and two Nb atoms. In the sixteenth O site, O is bonded in a T-shaped geometry to one Li and two Nb atoms. In the seventeenth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the eighteenth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the nineteenth O site, O is bonded in a T-shaped geometry to one Li and two Nb atoms. In the twentieth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twenty-first O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twenty-second O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twenty-third O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twenty-fourth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twenty-fifth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twenty-sixth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twenty-seventh O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twenty-eighth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twenty-ninth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the thirtieth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the thirty-first O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the thirty-second O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the thirty-third O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the thirty-fourth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the thirty-fifth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the thirty-sixth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the thirty-seventh O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the thirty-eighth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the thirty-ninth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the fortieth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the forty-first O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the forty-second O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the forty-third O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the forty-fourth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the forty-fifth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the forty-sixth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the forty-seventh O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Nb18P3O50 by Materials Project

Nb18P3O50 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are eighteen inequivalent Nb+4.72+ sites. In the first Nb+4.72+ site, Nb+4.72+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 2–33°. There are a spread of Nb–O bond distances ranging from 1.87–2.28 Å. In the second Nb+4.72+ site, Nb+4.72+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 3–33°. There are a spread of Nb–O bond distances ranging from 1.85–2.36 Å. In the third Nb+4.72+ site, Nb+4.72+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Nb–O bond distances ranging from 1.85–2.40 Å. In the fourth Nb+4.72+ site, Nb+4.72+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 6–7°. There are a spread of Nb–O bond distances ranging from 1.85–2.35 Å. In the fifth Nb+4.72+ site, Nb+4.72+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 8–10°. There are a spread of Nb–O bond distances ranging from 1.85–2.36 Å. In the sixth Nb+4.72+ site, Nb+4.72+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Nb–O bond distances ranging from 1.85–2.34 Å. In the seventh Nb+4.72+ site, Nb+4.72+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 1–34°. There are a spread of Nb–O bond distances ranging from 1.86–2.35 Å. In the eighth Nb+4.72+ site, Nb+4.72+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 3–34°. There are a spread of Nb–O bond distances ranging from 1.86–2.33 Å. In the ninth Nb+4.72+ site, Nb+4.72+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 1–3°. There are a spread of Nb–O bond distances ranging from 1.92–2.07 Å. In the tenth Nb+4.72+ site, Nb+4.72+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 1–3°. There are a spread of Nb–O bond distances ranging from 1.93–2.07 Å. In the eleventh Nb+4.72+ site, Nb+4.72+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 1–34°. There are a spread of Nb–O bond distances ranging from 1.86–2.33 Å. In the twelfth Nb+4.72+ site, Nb+4.72+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 3–34°. There are a spread of Nb–O bond distances ranging from 1.85–2.36 Å. In the thirteenth Nb+4.72+ site, Nb+4.72+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Nb–O bond distances ranging from 1.83–2.43 Å. In the fourteenth Nb+4.72+ site, Nb+4.72+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 5–6°. There are a spread of Nb–O bond distances ranging from 1.86–2.30 Å. In the fifteenth Nb+4.72+ site, Nb+4.72+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Nb–O bond distances ranging from 1.84–2.40 Å. In the sixteenth Nb+4.72+ site, Nb+4.72+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 5–8°. There are a spread of Nb–O bond distances ranging from 1.86–2.31 Å. In the seventeenth Nb+4.72+ site, Nb+4.72+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 3–34°. There are a spread of Nb–O bond distances ranging from 1.85–2.32 Å. In the eighteenth Nb+4.72+ site, Nb+4.72+ is bonded to six O2- atoms to form a mixture of distorted edge and corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 2–34°. There are a spread of Nb–O bond distances ranging from 1.86–2.33 Å. There are three inequivalent P5+ sites. In the first P5+ site, P5+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There is one shorter (1.52 Å) and two longer (1.55 Å) P–O bond length. In the second P5+ site, P5+ is bonded in a trigonal non-coplanar geometry to three O2- atoms. There are a spread of P–O bond distances ranging from 1.53–1.55 Å. In the third P5+ site, P5+ is bonded in a bent 120 degrees geometry to two O2- atoms. There is one shorter (1.53 Å) and one longer (1.55 Å) P–O bond length. There are fifty inequivalent O2- sites. In the first O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the second O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the third O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the fourth O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+4.72+ atoms. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+4.72+ atoms. In the seventh O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the eighth O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the ninth O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the tenth O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the eleventh O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+4.72+ atoms. In the twelfth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+4.72+ atoms. In the thirteenth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+4.72+ atoms. In the fourteenth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+4.72+ atoms. In the fifteenth O2- site, O2- is bonded in a 2-coordinate geometry to three Nb+4.72+ atoms. In the sixteenth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+4.72+ atoms. In the seventeenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Nb+4.72+ and one P5+ atom. In the eighteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Nb+4.72+ and one P5+ atom. In the nineteenth O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the twentieth O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the twenty-first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Nb+4.72+ and one P5+ atom. In the twenty-second O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Nb+4.72+ and one P5+ atom. In the twenty-third O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the twenty-fourth O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the twenty-fifth O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the twenty-sixth O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the twenty-seventh O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the twenty-eighth O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the twenty-ninth O2- site, O2- is bonded in a bent 150 degrees geometry to one Nb+4.72+ and one P5+ atom. In the thirtieth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Nb+4.72+ and one P5+ atom. In the thirty-first O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the thirty-second O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the thirty-third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one Nb+4.72+ and one P5+ atom. In the thirty-fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Nb+4.72+ and one P5+ atom. In the thirty-fifth O2- site, O2- is bonded in a 2-coordinate geometry to three Nb+4.72+ atoms. In the thirty-sixth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+4.72+ atoms. In the thirty-seventh O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+4.72+ atoms. In the thirty-eighth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+4.72+ atoms. In the thirty-ninth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+4.72+ atoms. In the fortieth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+4.72+ atoms. In the forty-first O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the forty-second O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the forty-third O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the forty-fourth O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the forty-fifth O2- site, O2- is bonded in a 2-coordinate geometry to three Nb+4.72+ atoms. In the forty-sixth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+4.72+ atoms. In the forty-seventh O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the forty-eighth O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the forty-ninth O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms. In the fiftieth O2- site, O2- is bonded in a linear geometry to two Nb+4.72+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sr7Nb34O52 by Materials Project

Sr7Nb34O52 crystallizes in the monoclinic Cm space group. The structure is three-dimensional. there are seven inequivalent Sr sites. In the first Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with five SrO12 cuboctahedra, corners with two equivalent NbO5 square pyramids, faces with two SrO12 cuboctahedra, faces with two equivalent NbO6 octahedra, and faces with six NbO5 square pyramids. There are a spread of Sr–O bond distances ranging from 2.78–3.15 Å. In the second Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with five SrO12 cuboctahedra, corners with two equivalent NbO5 square pyramids, faces with three SrO12 cuboctahedra, faces with two equivalent NbO6 octahedra, and faces with six NbO5 square pyramids. There are a spread of Sr–O bond distances ranging from 2.82–3.08 Å. In the third Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with three SrO12 cuboctahedra, corners with two equivalent NbO5 square pyramids, faces with four SrO12 cuboctahedra, faces with two equivalent NbO6 octahedra, and faces with six NbO5 square pyramids. There are a spread of Sr–O bond distances ranging from 2.85–2.96 Å. In the fourth Sr site, Sr is bonded to twelve O atoms to form distorted SrO12 cuboctahedra that share corners with five SrO12 cuboctahedra, corners with two equivalent NbO5 square pyramids, faces with three SrO12 cuboctahedra, faces with two equivalent NbO6 octahedra, and faces with six NbO5 square pyramids. There are a spread of Sr–O bond distances ranging from 2.72–3.14 Å. In the fifth Sr site, Sr is bonded to twelve O atoms to form distorted SrO12 cuboctahedra that share corners with three SrO12 cuboctahedra, corners with two equivalent NbO5 square pyramids, faces with four SrO12 cuboctahedra, faces with two equivalent NbO6 octahedra, and faces with six NbO5 square pyramids. There are a spread of Sr–O bond distances ranging from 2.73–3.13 Å. In the sixth Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with five SrO12 cuboctahedra, corners with two equivalent NbO5 square pyramids, faces with four SrO12 cuboctahedra, faces with two equivalent NbO6 octahedra, and faces with six NbO5 square pyramids. There are a spread of Sr–O bond distances ranging from 2.79–3.07 Å. In the seventh Sr site, Sr is bonded to twelve O atoms to form SrO12 cuboctahedra that share corners with four SrO12 cuboctahedra, corners with two equivalent NbO5 square pyramids, faces with four SrO12 cuboctahedra, faces with two equivalent NbO6 octahedra, and faces with six NbO5 square pyramids. There are a spread of Sr–O bond distances ranging from 2.79–3.08 Å. There are twenty-one inequivalent Nb sites. In the first Nb site, Nb is bonded to five O atoms to form NbO5 square pyramids that share corners with two SrO12 cuboctahedra, corners with five NbO5 square pyramids, an edgeedge with one NbO5 square pyramid, and a faceface with one SrO12 cuboctahedra. There are a spread of Nb–O bond distances ranging from 2.07–2.16 Å. In the second Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.08–2.17 Å. In the third Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.09–2.18 Å. In the fourth Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.10–2.15 Å. In the fifth Nb site, Nb is bonded in a square co-planar geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.10–2.16 Å. In the sixth Nb site, Nb is bonded to five O atoms to form NbO5 square pyramids that share a cornercorner with one NbO6 octahedra, corners with five NbO5 square pyramids, and faces with three SrO12 cuboctahedra. The corner-sharing octahedral tilt angles are 7°. There are a spread of Nb–O bond distances ranging from 2.03–2.15 Å. In the seventh Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.08–2.19 Å. In the eighth Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.08–2.18 Å. In the ninth Nb site, Nb is bonded to five O atoms to form NbO5 square pyramids that share a cornercorner with one NbO6 octahedra, corners with five NbO5 square pyramids, and faces with three SrO12 cuboctahedra. The corner-sharing octahedral tilt angles are 14°. There are a spread of Nb–O bond distances ranging from 2.07–2.17 Å. In the tenth Nb site, Nb is bonded to five O atoms to form NbO5 square pyramids that share corners with two SrO12 cuboctahedra, corners with five NbO5 square pyramids, an edgeedge with one NbO5 square pyramid, and faces with two SrO12 cuboctahedra. There are a spread of Nb–O bond distances ranging from 2.10–2.17 Å. In the eleventh Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with two equivalent NbO6 octahedra, corners with four NbO5 square pyramids, and faces with seven SrO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 4–7°. There are a spread of Nb–O bond distances ranging from 1.97–2.11 Å. In the twelfth Nb site, Nb is bonded to five O atoms to form NbO5 square pyramids that share corners with two SrO12 cuboctahedra, corners with five NbO5 square pyramids, an edgeedge with one NbO5 square pyramid, and faces with two SrO12 cuboctahedra. There are a spread of Nb–O bond distances ranging from 2.10–2.17 Å. In the thirteenth Nb site, Nb is bonded to five O atoms to form NbO5 square pyramids that share a cornercorner with one NbO6 octahedra, corners with five NbO5 square pyramids, and faces with four SrO12 cuboctahedra. The corner-sharing octahedral tilt angles are 6°. There are a spread of Nb–O bond distances ranging from 2.06–2.14 Å. In the fourteenth Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.09–2.17 Å. In the fifteenth Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.08–2.16 Å. In the sixteenth Nb site, Nb is bonded to five O atoms to form NbO5 square pyramids that share a cornercorner with one NbO6 octahedra, corners with five NbO5 square pyramids, and faces with four SrO12 cuboctahedra. The corner-sharing octahedral tilt angles are 9°. There are a spread of Nb–O bond distances ranging from 2.05–2.15 Å. In the seventeenth Nb site, Nb is bonded in a square co-planar geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.09–2.15 Å. In the eighteenth Nb site, Nb is bonded in a square co-planar geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.10–2.15 Å. In the nineteenth Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.07–2.17 Å. In the twentieth Nb site, Nb is bonded in a rectangular see-saw-like geometry to four O atoms. There are a spread of Nb–O bond distances ranging from 2.06–2.17 Å. In the twenty-first Nb site, Nb is bonded to five O atoms to form NbO5 square pyramids that share a cornercorner with one SrO12 cuboctahedra, corners with five NbO5 square pyramids, an edgeedge with one NbO5 square pyramid, and faces with two SrO12 cuboctahedra. There are a spread of Nb–O bond distances ranging from 2.10–2.16 Å. There are thirty-nine inequivalent O sites. In the first O site, O is bonded in a rectangular see-saw-like geometry to four Nb atoms. In the second O site, O is bonded in a rectangular see-saw-like geometry to four Nb atoms. In the third O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the fourth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the fifth O site, O is bonded in a square co-planar geometry to four Nb atoms. In the sixth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the seventh O site, O is bonded in a T-shaped geometry to three Nb atoms. In the eighth O site, O is bonded in a rectangular see-saw-like geometry to four Nb atoms. In the ninth O site, O is bonded in a rectangular see-saw-like geometry to four Nb atoms. In the tenth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the eleventh O site, O is bonded in a square co-planar geometry to four Nb atoms. In the twelfth O site, O is bonded in a square co-planar geometry to four Nb atoms. In the thirteenth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the fourteenth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the fifteenth O site, O is bonded to two Sr and three Nb atoms to form a mixture of distorted corner and edge-sharing OSr2Nb3 trigonal bipyramids. In the sixteenth O site, O is bonded to two Sr and three Nb atoms to form distorted OSr2Nb3 trigonal bipyramids that share a cornercorner with one OSr3Nb2 square pyramid, corners with five OSr2Nb3 trigonal bipyramids, and an edgeedge with one OSr2Nb3 trigonal bipyramid. In the seventeenth O site, O is bonded in a distorted see-saw-like geometry to one Sr and three Nb atoms. In the eighteenth O site, O is bonded to two Sr and three Nb atoms to form a mixture of distorted corner and edge-sharing OSr2Nb3 trigonal bipyramids. In the nineteenth O site, O is bonded in a distorted linear geometry to three Sr and two Nb atoms. In the twentieth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the twenty-first O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the twenty-second O site, O is bonded in a 2-coordinate geometry to three Sr and two Nb atoms. In the twenty-third O site, O is bonded to two Sr and three Nb atoms to form distorted OSr2Nb3 trigonal bipyramids that share a cornercorner with one OSr3Nb2 square pyramid, corners with seven OSr2Nb3 trigonal bipyramids, an edgeedge with one OSr2Nb3 trigonal bipyramid, and a faceface with one OSr2Nb3 trigonal bipyramid. In the twenty-fourth O site, O is bonded to three Sr and two equivalent Nb atoms to form a mixture of distorted corner and edge-sharing OSr3Nb2 square pyramids. In the twenty-fifth O site, O is bonded in a distorted linear geometry to four Sr and two equivalent Nb atoms. In the twenty-sixth O site, O is bonded in a distorted T-shaped geometry to two Sr and three Nb atoms. In the twenty-seventh O site, O is bonded in a distorted linear geometry to four Sr and two Nb atoms. In the twenty-eighth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the twenty-ninth O site, O is bonded in a distorted rectangular see-saw-like geometry to one Sr and three Nb atoms. In the thirtieth O site, O is bonded in a 2-coordinate geometry to four Sr and two Nb atoms. In the thirty-first O site, O is bonded to two Sr and three Nb atoms to form a mixture of distorted corner and edge-sharing OSr2Nb3 trigonal bipyramids. In the thirty-second O site, O is bonded to two Sr and three Nb atoms to form distorted OSr2Nb3 trigonal bipyramids that share corners with five OSr2Nb3 trigonal bipyramids, an edgeedge with one OSr3Nb2 square pyramid, and edges with two equivalent OSr2Nb3 trigonal bipyramids. In the thirty-third O site, O is bonded to two Sr and three Nb atoms to form distorted OSr2Nb3 trigonal bipyramids that share a cornercorner with one OSr3Nb2 square pyramid, corners with five OSr2Nb3 trigonal bipyramids, edges with two OSr2Nb3 trigonal b

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li7Nb8O24 by Materials Project

Li7Nb8O24 is beta indium sulfide-derived structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are fourteen inequivalent Li sites. In the first Li site, Li is bonded to six O atoms to form distorted LiO6 octahedra that share corners with three NbO6 octahedra, edges with three NbO6 octahedra, and a faceface with one NbO6 octahedra. The corner-sharing octahedra tilt angles range from 61–62°. There are a spread of Li–O bond distances ranging from 2.09–2.30 Å. In the second Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.10–2.33 Å. In the third Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.08–2.35 Å. In the fourth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.10–2.33 Å. In the fifth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.09–2.31 Å. In the sixth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.11–2.30 Å. In the seventh Li site, Li is bonded to six O atoms to form distorted LiO6 pentagonal pyramids that share corners with three NbO6 octahedra, edges with three NbO6 octahedra, and a faceface with one NbO6 octahedra. The corner-sharing octahedra tilt angles range from 60–63°. There are a spread of Li–O bond distances ranging from 2.08–2.26 Å. In the eighth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.10–2.32 Å. In the ninth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.09–2.33 Å. In the tenth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.07–2.35 Å. In the eleventh Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.07–2.29 Å. In the twelfth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.10–2.29 Å. In the thirteenth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.09–2.34 Å. In the fourteenth Li site, Li is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Li–O bond distances ranging from 2.12–2.32 Å. There are sixteen inequivalent Nb sites. In the first Nb site, Nb is bonded to six O atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 33–41°. There are a spread of Nb–O bond distances ranging from 1.89–2.18 Å. In the second Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with six NbO6 octahedra, an edgeedge with one LiO6 octahedra, and an edgeedge with one LiO6 pentagonal pyramid. The corner-sharing octahedra tilt angles range from 37–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.16 Å. In the third Nb site, Nb is bonded to six O atoms to form distorted NbO6 octahedra that share corners with six NbO6 octahedra and a faceface with one LiO6 octahedra. The corner-sharing octahedra tilt angles range from 39–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.18 Å. In the fourth Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with six NbO6 octahedra and an edgeedge with one LiO6 octahedra. The corner-sharing octahedra tilt angles range from 34–40°. There are a spread of Nb–O bond distances ranging from 1.89–2.17 Å. In the fifth Nb site, Nb is bonded to six O atoms to form distorted NbO6 octahedra that share corners with six NbO6 octahedra and an edgeedge with one LiO6 pentagonal pyramid. The corner-sharing octahedra tilt angles range from 32–41°. There are a spread of Nb–O bond distances ranging from 1.89–2.24 Å. In the sixth Nb site, Nb is bonded to six O atoms to form distorted NbO6 octahedra that share corners with six NbO6 octahedra and a cornercorner with one LiO6 pentagonal pyramid. The corner-sharing octahedra tilt angles range from 32–42°. There are a spread of Nb–O bond distances ranging from 1.88–2.24 Å. In the seventh Nb site, Nb is bonded to six O atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 32–42°. There are a spread of Nb–O bond distances ranging from 1.90–2.16 Å. In the eighth Nb site, Nb is bonded to six O atoms to form distorted NbO6 octahedra that share a cornercorner with one LiO6 octahedra, corners with six NbO6 octahedra, and a cornercorner with one LiO6 pentagonal pyramid. The corner-sharing octahedra tilt angles range from 33–62°. There are a spread of Nb–O bond distances ranging from 1.88–2.21 Å. In the ninth Nb site, Nb is bonded to six O atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 32–42°. There are a spread of Nb–O bond distances ranging from 1.88–2.23 Å. In the tenth Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with six NbO6 octahedra and a cornercorner with one LiO6 pentagonal pyramid. The corner-sharing octahedra tilt angles range from 34–42°. There are a spread of Nb–O bond distances ranging from 1.89–2.17 Å. In the eleventh Nb site, Nb is bonded to six O atoms to form distorted NbO6 octahedra that share corners with six NbO6 octahedra and an edgeedge with one LiO6 pentagonal pyramid. The corner-sharing octahedra tilt angles range from 38–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.18 Å. In the twelfth Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with six NbO6 octahedra and a faceface with one LiO6 pentagonal pyramid. The corner-sharing octahedra tilt angles range from 32–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.16 Å. In the thirteenth Nb site, Nb is bonded to six O atoms to form distorted NbO6 octahedra that share a cornercorner with one LiO6 octahedra and corners with six NbO6 octahedra. The corner-sharing octahedra tilt angles range from 32–62°. There are a spread of Nb–O bond distances ranging from 1.90–2.19 Å. In the fourteenth Nb site, Nb is bonded to six O atoms to form distorted NbO6 octahedra that share corners with six NbO6 octahedra and an edgeedge with one LiO6 octahedra. The corner-sharing octahedra tilt angles range from 34–41°. There are a spread of Nb–O bond distances ranging from 1.89–2.24 Å. In the fifteenth Nb site, Nb is bonded to six O atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 39–41°. There are a spread of Nb–O bond distances ranging from 1.90–2.15 Å. In the sixteenth Nb site, Nb is bonded to six O atoms to form distorted NbO6 octahedra that share a cornercorner with one LiO6 octahedra and corners with six NbO6 octahedra. The corner-sharing octahedra tilt angles range from 34–61°. There are a spread of Nb–O bond distances ranging from 1.89–2.23 Å. There are forty-eight inequivalent O sites. In the first O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the second O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the third O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the fourth O site, O is bonded in a T-shaped geometry to one Li and two Nb atoms. In the fifth O site, O is bonded in a distorted trigonal planar geometry to one Li and two Nb atoms. In the sixth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the seventh O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the eighth O site, O is bonded in a distorted trigonal planar geometry to one Li and two Nb atoms. In the ninth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the tenth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the eleventh O site, O is bonded in a T-shaped geometry to one Li and two Nb atoms. In the twelfth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the thirteenth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the fourteenth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the fifteenth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the sixteenth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the seventeenth O site, O is bonded in a distorted trigonal planar geometry to one Li and two Nb atoms. In the eighteenth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the nineteenth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twentieth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twenty-first O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twenty-second O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twenty-third O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twenty-fourth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twenty-fifth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twenty-sixth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twenty-seventh O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the twenty-eighth O site, O is bonded in a T-shaped geometry to one Li and two Nb atoms. In the twenty-ninth O site, O is bonded in a T-shaped geometry to one Li and two Nb atoms. In the thirtieth O site, O is bonded in a T-shaped geometry to one Li and two Nb atoms. In the thirty-first O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the thirty-second O site, O is bonded in a distorted trigonal planar geometry to one Li and two Nb atoms. In the thirty-third O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the thirty-fourth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the thirty-fifth O site, O is bonded in a distorted trigonal planar geometry to one Li and two Nb atoms. In the thirty-sixth O site, O is bonded in a distorted trigonal planar geometry to one Li and two Nb atoms. In the thirty-seventh O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the thirty-eighth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the thirty-ninth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the fortieth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the forty-first O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the forty-second O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the forty-third O site, O is bonded in a T-shaped geometry to one Li and two Nb atoms. In the forty-fourth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the forty-fifth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the forty-sixth O site, O is bonded in a distorted see-saw-like geometry to two Li and two Nb atoms. In the forty-seventh O site, O is b

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Rb3Nb20O34 by Materials Project

Rb3Nb20O34 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are three inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Rb–O bond distances ranging from 2.98–3.30 Å. In the second Rb1+ site, Rb1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Rb–O bond distances ranging from 3.04–3.16 Å. In the third Rb1+ site, Rb1+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of Rb–O bond distances ranging from 2.90–3.34 Å. There are twenty inequivalent Nb+3.25+ sites. In the first Nb+3.25+ site, Nb+3.25+ is bonded to five O2- atoms to form NbO5 square pyramids that share corners with two NbO6 octahedra, corners with six NbO5 square pyramids, a cornercorner with one NbO4 tetrahedra, and edges with two NbO5 square pyramids. The corner-sharing octahedra tilt angles range from 43–44°. There are a spread of Nb–O bond distances ranging from 2.13–2.29 Å. In the second Nb+3.25+ site, Nb+3.25+ is bonded to four O2- atoms to form NbO4 tetrahedra that share corners with three NbO6 octahedra and corners with three NbO5 square pyramids. The corner-sharing octahedral tilt angles are 54°. There are a spread of Nb–O bond distances ranging from 1.88–1.92 Å. In the third Nb+3.25+ site, Nb+3.25+ is bonded to five O2- atoms to form NbO5 square pyramids that share corners with two NbO6 octahedra, corners with six NbO5 square pyramids, a cornercorner with one NbO4 tetrahedra, and edges with two NbO5 square pyramids. The corner-sharing octahedra tilt angles range from 43–45°. There are a spread of Nb–O bond distances ranging from 2.13–2.28 Å. In the fourth Nb+3.25+ site, Nb+3.25+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO5 square pyramids and corners with three NbO4 tetrahedra. There are a spread of Nb–O bond distances ranging from 2.00–2.16 Å. In the fifth Nb+3.25+ site, Nb+3.25+ is bonded to five O2- atoms to form NbO5 square pyramids that share corners with two equivalent NbO6 octahedra, corners with six NbO5 square pyramids, a cornercorner with one NbO4 tetrahedra, and edges with two NbO5 square pyramids. The corner-sharing octahedra tilt angles range from 44–45°. There are a spread of Nb–O bond distances ranging from 2.12–2.27 Å. In the sixth Nb+3.25+ site, Nb+3.25+ is bonded to five O2- atoms to form NbO5 square pyramids that share corners with two equivalent NbO6 octahedra, corners with six NbO5 square pyramids, a cornercorner with one NbO4 tetrahedra, and edges with two NbO5 square pyramids. The corner-sharing octahedral tilt angles are 46°. There are a spread of Nb–O bond distances ranging from 2.11–2.28 Å. In the seventh Nb+3.25+ site, Nb+3.25+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO5 square pyramids and corners with three NbO4 tetrahedra. There are a spread of Nb–O bond distances ranging from 2.04–2.19 Å. In the eighth Nb+3.25+ site, Nb+3.25+ is bonded to five O2- atoms to form NbO5 square pyramids that share corners with two NbO6 octahedra, corners with six NbO5 square pyramids, a cornercorner with one NbO4 tetrahedra, and edges with two NbO5 square pyramids. The corner-sharing octahedra tilt angles range from 44–45°. There are a spread of Nb–O bond distances ranging from 2.10–2.27 Å. In the ninth Nb+3.25+ site, Nb+3.25+ is bonded to four O2- atoms to form NbO4 tetrahedra that share corners with three NbO6 octahedra and corners with three NbO5 square pyramids. The corner-sharing octahedra tilt angles range from 51–55°. There are a spread of Nb–O bond distances ranging from 1.88–1.91 Å. In the tenth Nb+3.25+ site, Nb+3.25+ is bonded to four O2- atoms to form NbO4 tetrahedra that share corners with three NbO6 octahedra and corners with three NbO5 square pyramids. The corner-sharing octahedra tilt angles range from 51–58°. There are a spread of Nb–O bond distances ranging from 1.88–1.92 Å. In the eleventh Nb+3.25+ site, Nb+3.25+ is bonded to five O2- atoms to form NbO5 square pyramids that share corners with two NbO6 octahedra, corners with six NbO5 square pyramids, a cornercorner with one NbO4 tetrahedra, and edges with two NbO5 square pyramids. The corner-sharing octahedra tilt angles range from 44–45°. There are a spread of Nb–O bond distances ranging from 2.10–2.27 Å. In the twelfth Nb+3.25+ site, Nb+3.25+ is bonded to five O2- atoms to form NbO5 square pyramids that share corners with two equivalent NbO6 octahedra, corners with six NbO5 square pyramids, a cornercorner with one NbO4 tetrahedra, and edges with two NbO5 square pyramids. The corner-sharing octahedral tilt angles are 43°. There are a spread of Nb–O bond distances ranging from 2.12–2.27 Å. In the thirteenth Nb+3.25+ site, Nb+3.25+ is bonded to five O2- atoms to form NbO5 square pyramids that share corners with two NbO6 octahedra, corners with six NbO5 square pyramids, a cornercorner with one NbO4 tetrahedra, and edges with two NbO5 square pyramids. The corner-sharing octahedra tilt angles range from 44–45°. There are a spread of Nb–O bond distances ranging from 2.11–2.27 Å. In the fourteenth Nb+3.25+ site, Nb+3.25+ is bonded to five O2- atoms to form NbO5 square pyramids that share corners with two NbO6 octahedra, corners with six NbO5 square pyramids, a cornercorner with one NbO4 tetrahedra, and edges with two NbO5 square pyramids. The corner-sharing octahedra tilt angles range from 44–45°. There are a spread of Nb–O bond distances ranging from 2.10–2.27 Å. In the fifteenth Nb+3.25+ site, Nb+3.25+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO5 square pyramids and corners with three NbO4 tetrahedra. There are a spread of Nb–O bond distances ranging from 2.02–2.17 Å. In the sixteenth Nb+3.25+ site, Nb+3.25+ is bonded to six O2- atoms to form NbO6 octahedra that share corners with six NbO5 square pyramids and corners with three NbO4 tetrahedra. There are a spread of Nb–O bond distances ranging from 2.07–2.14 Å. In the seventeenth Nb+3.25+ site, Nb+3.25+ is bonded to five O2- atoms to form NbO5 square pyramids that share corners with two equivalent NbO6 octahedra, corners with six NbO5 square pyramids, a cornercorner with one NbO4 tetrahedra, and edges with two NbO5 square pyramids. The corner-sharing octahedra tilt angles range from 44–45°. There are a spread of Nb–O bond distances ranging from 2.11–2.26 Å. In the eighteenth Nb+3.25+ site, Nb+3.25+ is bonded to four O2- atoms to form NbO4 tetrahedra that share corners with three NbO6 octahedra and corners with three NbO5 square pyramids. The corner-sharing octahedra tilt angles range from 52–60°. There are a spread of Nb–O bond distances ranging from 1.88–1.92 Å. In the nineteenth Nb+3.25+ site, Nb+3.25+ is bonded to five O2- atoms to form NbO5 square pyramids that share corners with two NbO6 octahedra, corners with six NbO5 square pyramids, a cornercorner with one NbO4 tetrahedra, and edges with two NbO5 square pyramids. The corner-sharing octahedral tilt angles are 44°. There are a spread of Nb–O bond distances ranging from 2.12–2.26 Å. In the twentieth Nb+3.25+ site, Nb+3.25+ is bonded to five O2- atoms to form NbO5 square pyramids that share corners with two NbO6 octahedra, corners with six NbO5 square pyramids, a cornercorner with one NbO4 tetrahedra, and edges with two NbO5 square pyramids. The corner-sharing octahedra tilt angles range from 44–45°. There are a spread of Nb–O bond distances ranging from 2.12–2.26 Å. There are thirty-four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+3.25+ atoms. In the second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to four Nb+3.25+ atoms. In the third O2- site, O2- is bonded in a 2-coordinate geometry to two Rb1+ and two Nb+3.25+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to three Rb1+ and two Nb+3.25+ atoms. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+3.25+ atoms. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+3.25+ atoms. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to two Rb1+ and two Nb+3.25+ atoms. In the eighth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to three Rb1+ and two Nb+3.25+ atoms. In the ninth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to three Rb1+ and two Nb+3.25+ atoms. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+3.25+ atoms. In the eleventh O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to four Nb+3.25+ atoms. In the twelfth O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to four Nb+3.25+ atoms. In the thirteenth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+3.25+ atoms. In the fourteenth O2- site, O2- is bonded in a square co-planar geometry to four Nb+3.25+ atoms. In the fifteenth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to three Rb1+ and two Nb+3.25+ atoms. In the sixteenth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+3.25+ atoms. In the seventeenth O2- site, O2- is bonded in a square co-planar geometry to four Nb+3.25+ atoms. In the eighteenth O2- site, O2- is bonded in a square co-planar geometry to four Nb+3.25+ atoms. In the nineteenth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+3.25+ atoms. In the twentieth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Rb1+ and two Nb+3.25+ atoms. In the twenty-first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two equivalent Rb1+ and two Nb+3.25+ atoms. In the twenty-second O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+3.25+ atoms. In the twenty-third O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+3.25+ atoms. In the twenty-fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two Rb1+ and two Nb+3.25+ atoms. In the twenty-fifth O2- site, O2- is bonded in a 2-coordinate geometry to one Rb1+ and two Nb+3.25+ atoms. In the twenty-sixth O2- site, O2- is bonded in a 2-coordinate geometry to two Rb1+ and two Nb+3.25+ atoms. In the twenty-seventh O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+3.25+ atoms. In the twenty-eighth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+3.25+ atoms. In the twenty-ninth O2- site, O2- is bonded in a square co-planar geometry to four Nb+3.25+ atoms. In the thirtieth O2- site, O2- is bonded in a 3-coordinate geometry to three Nb+3.25+ atoms. In the thirty-first O2- site, O2- is bonded in a 2-coordinate geometry to two Rb1+ and two Nb+3.25+ atoms. In the thirty-second O2- site, O2- is bonded in a distorted trigonal pyramidal geometry to four Nb+3.25+ atoms. In the thirty-third O2- site, O2- is bonded in a square co-planar geometry to four Nb+3.25+ atoms. In the thirty-fourth O2- site, O2- is bonded in a square co-planar geometry to four Nb+3.25+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na2Nb18Tl7(PO8)9 by Materials Project

Na2Nb18Tl5(PO8)9(Tl)2 crystallizes in the triclinic P1 space group. The structure is three-dimensional and consists of two thallium molecules and one Na2Nb18Tl5(PO8)9 framework. In the Na2Nb18Tl5(PO8)9 framework, there are two inequivalent Na sites. In the first Na site, Na is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Na–O bond distances ranging from 2.48–2.53 Å. In the second Na site, Na is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Na–O bond distances ranging from 2.47–2.52 Å. There are eighteen inequivalent Nb sites. In the first Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 9–39°. There are a spread of Nb–O bond distances ranging from 1.89–2.17 Å. In the second Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 9–37°. There are a spread of Nb–O bond distances ranging from 1.89–2.17 Å. In the third Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 7–36°. There are a spread of Nb–O bond distances ranging from 1.90–2.17 Å. In the fourth Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 7–34°. There are a spread of Nb–O bond distances ranging from 1.87–2.16 Å. In the fifth Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 7–36°. There are a spread of Nb–O bond distances ranging from 1.88–2.16 Å. In the sixth Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 1–39°. There are a spread of Nb–O bond distances ranging from 1.86–2.13 Å. In the seventh Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 7–32°. There are a spread of Nb–O bond distances ranging from 1.88–2.16 Å. In the eighth Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 2–34°. There are a spread of Nb–O bond distances ranging from 1.86–2.18 Å. In the ninth Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 6–37°. There are a spread of Nb–O bond distances ranging from 1.89–2.13 Å. In the tenth Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 1–37°. There are a spread of Nb–O bond distances ranging from 1.85–2.18 Å. In the eleventh Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 2–38°. There are a spread of Nb–O bond distances ranging from 1.87–2.15 Å. In the twelfth Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 7–34°. There are a spread of Nb–O bond distances ranging from 1.89–2.17 Å. In the thirteenth Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 6–37°. There are a spread of Nb–O bond distances ranging from 1.86–2.17 Å. In the fourteenth Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 4–37°. There are a spread of Nb–O bond distances ranging from 1.87–2.17 Å. In the fifteenth Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 7–38°. There are a spread of Nb–O bond distances ranging from 1.89–2.11 Å. In the sixteenth Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 4–37°. There are a spread of Nb–O bond distances ranging from 1.88–2.13 Å. In the seventeenth Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 5–37°. There are a spread of Nb–O bond distances ranging from 1.86–2.17 Å. In the eighteenth Nb site, Nb is bonded to six O atoms to form NbO6 octahedra that share corners with four NbO6 octahedra and corners with two PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 5–34°. There are a spread of Nb–O bond distances ranging from 1.88–2.13 Å. There are five inequivalent Tl sites. In the first Tl site, Tl is bonded in a single-bond geometry to one O atom. The Tl–O bond length is 2.81 Å. In the second Tl site, Tl is bonded in a 3-coordinate geometry to three O atoms. There are a spread of Tl–O bond distances ranging from 2.53–2.78 Å. In the third Tl site, Tl is bonded in a 1-coordinate geometry to one O atom. The Tl–O bond length is 2.66 Å. In the fourth Tl site, Tl is bonded in a 3-coordinate geometry to three O atoms. There are a spread of Tl–O bond distances ranging from 2.82–2.85 Å. In the fifth Tl site, Tl is bonded in a 1-coordinate geometry to four O atoms. There are a spread of Tl–O bond distances ranging from 2.76–2.93 Å. There are nine inequivalent P sites. In the first P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 38–43°. There are a spread of P–O bond distances ranging from 1.53–1.56 Å. In the second P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 33–40°. There is one shorter (1.54 Å) and three longer (1.55 Å) P–O bond length. In the third P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 32–44°. There is one shorter (1.54 Å) and three longer (1.55 Å) P–O bond length. In the fourth P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 37–40°. There are a spread of P–O bond distances ranging from 1.54–1.56 Å. In the fifth P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 37–41°. There are a spread of P–O bond distances ranging from 1.54–1.56 Å. In the sixth P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 37–41°. There are a spread of P–O bond distances ranging from 1.54–1.56 Å. In the seventh P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 31–47°. There are a spread of P–O bond distances ranging from 1.54–1.56 Å. In the eighth P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 38–43°. There are a spread of P–O bond distances ranging from 1.54–1.56 Å. In the ninth P site, P is bonded to four O atoms to form PO4 tetrahedra that share corners with four NbO6 octahedra. The corner-sharing octahedra tilt angles range from 39–42°. There are a spread of P–O bond distances ranging from 1.54–1.56 Å. There are seventy-two inequivalent O sites. In the first O site, O is bonded in a 3-coordinate geometry to one Na, one Nb, and one P atom. In the second O site, O is bonded in a bent 150 degrees geometry to two Nb atoms. In the third O site, O is bonded in a 3-coordinate geometry to one Na, one Nb, and one P atom. In the fourth O site, O is bonded in a 2-coordinate geometry to one Nb, one Tl, and one P atom. In the fifth O site, O is bonded in a bent 150 degrees geometry to one Nb and one P atom. In the sixth O site, O is bonded in a bent 150 degrees geometry to one Nb and one P atom. In the seventh O site, O is bonded in a bent 150 degrees geometry to one Nb and one P atom. In the eighth O site, O is bonded in a bent 150 degrees geometry to two Nb atoms. In the ninth O site, O is bonded in a bent 150 degrees geometry to two Nb atoms. In the tenth O site, O is bonded in a bent 150 degrees geometry to one Nb and one P atom. In the eleventh O site, O is bonded in a linear geometry to two Nb atoms. In the twelfth O site, O is bonded in a distorted bent 150 degrees geometry to one Nb, one Tl, and one P atom. In the thirteenth O site, O is bonded in a 3-coordinate geometry to one Nb, one Tl, and one P atom. In the fourteenth O site, O is bonded in a distorted bent 150 degrees geometry to two Nb and one Tl atom. In the fifteenth O site, O is bonded in a 3-coordinate geometry to one Na, one Nb, and one P atom. In the sixteenth O site, O is bonded in a bent 150 degrees geometry to two Nb atoms. In the seventeenth O site, O is bonded in a distorted bent 150 degrees geometry to one Nb and one P atom. In the eighteenth O site, O is bonded in a 3-coordinate geometry to one Na, one Nb, and one P atom. In the nineteenth O site, O is bonded in a linear geometry to two Nb atoms. In the twentieth O site, O is bonded in a bent 150 degrees geometry to two Nb atoms. In the twenty-first O site, O is bonded in a bent 150 degrees geometry to two Nb atoms. In the twenty-second O site, O is bonded in a distorted bent 150 degrees geometry to one Nb and one P atom. In the twenty-third O site, O is bonded in a linear geometry to two Nb atoms. In the twenty-fourth O site, O is bonded in a bent 150 degrees geometry to two Nb atoms. In the twenty-fifth O site, O is bonded in a 3-coordinate geometry to one Na, one Nb, and one P atom. In the twenty-sixth O site, O is bonded in a bent 150 degrees geometry to two Nb atoms. In the twenty-seventh O site, O is bonded in a bent 150 degrees geometry to two Nb atoms. In the twenty-eighth O site, O is bonded in a bent 150 degrees geometry to one Nb and one P atom. In the twenty-ninth O site, O is bonded in a distorted bent 150 degrees geometry to two Nb and one Tl atom. In the thirtieth O site, O is bonded in a bent 150 degrees geometry to two Nb atoms. In the thirty-first O site, O is bonded in a distorted bent 150 degrees geometry to two Nb atoms. In the thirty-second O site, O is bonded in a linear geometry to two Nb atoms. In the thirty-third O site, O is bonded in a 2-coordinate geometry to one Nb, one Tl, and one P atom. In the thirty-fourth O site, O is bonded in a 2-coordinate geometry to one Nb, one Tl, and one P atom. In the thirty-fifth O site, O is bonded in a bent 150 degrees geometry to two Nb atoms. In the thirty-sixth O site, O is bonded in a 3-coordinate geometry to one Na, one Nb,

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Li13Nb14ZnO42 by Materials Project

Li13Nb14ZnO42 is Ilmenite-derived structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are thirteen inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Li–O bond distances ranging from 2.07–2.32 Å. In the second Li1+ site, Li1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Li–O bond distances ranging from 2.07–2.31 Å. In the third Li1+ site, Li1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Li–O bond distances ranging from 2.07–2.31 Å. In the fourth Li1+ site, Li1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Li–O bond distances ranging from 2.08–2.31 Å. In the fifth Li1+ site, Li1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Li–O bond distances ranging from 2.07–2.32 Å. In the sixth Li1+ site, Li1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Li–O bond distances ranging from 2.07–2.31 Å. In the seventh Li1+ site, Li1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Li–O bond distances ranging from 2.07–2.32 Å. In the eighth Li1+ site, Li1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Li–O bond distances ranging from 2.07–2.32 Å. In the ninth Li1+ site, Li1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Li–O bond distances ranging from 2.08–2.33 Å. In the tenth Li1+ site, Li1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Li–O bond distances ranging from 2.07–2.31 Å. In the eleventh Li1+ site, Li1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Li–O bond distances ranging from 2.08–2.32 Å. In the twelfth Li1+ site, Li1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Li–O bond distances ranging from 2.07–2.32 Å. In the thirteenth Li1+ site, Li1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Li–O bond distances ranging from 2.07–2.32 Å. There are fourteen inequivalent Nb+4.93+ sites. In the first Nb+4.93+ site, Nb+4.93+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 39–41°. There are a spread of Nb–O bond distances ranging from 1.91–2.17 Å. In the second Nb+4.93+ site, Nb+4.93+ is bonded to six O2- atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 37–43°. There are a spread of Nb–O bond distances ranging from 1.90–2.20 Å. In the third Nb+4.93+ site, Nb+4.93+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 37–42°. There are a spread of Nb–O bond distances ranging from 1.91–2.16 Å. In the fourth Nb+4.93+ site, Nb+4.93+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 40–41°. There are a spread of Nb–O bond distances ranging from 1.91–2.17 Å. In the fifth Nb+4.93+ site, Nb+4.93+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 36–42°. There are a spread of Nb–O bond distances ranging from 1.89–2.20 Å. In the sixth Nb+4.93+ site, Nb+4.93+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 39–41°. There are a spread of Nb–O bond distances ranging from 1.91–2.17 Å. In the seventh Nb+4.93+ site, Nb+4.93+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 39–42°. There are a spread of Nb–O bond distances ranging from 1.91–2.16 Å. In the eighth Nb+4.93+ site, Nb+4.93+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 38–42°. There are a spread of Nb–O bond distances ranging from 1.91–2.16 Å. In the ninth Nb+4.93+ site, Nb+4.93+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 40–41°. There are a spread of Nb–O bond distances ranging from 1.91–2.17 Å. In the tenth Nb+4.93+ site, Nb+4.93+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 36–43°. There are a spread of Nb–O bond distances ranging from 1.93–2.15 Å. In the eleventh Nb+4.93+ site, Nb+4.93+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 39–41°. There are a spread of Nb–O bond distances ranging from 1.92–2.15 Å. In the twelfth Nb+4.93+ site, Nb+4.93+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 38–42°. There are a spread of Nb–O bond distances ranging from 1.91–2.19 Å. In the thirteenth Nb+4.93+ site, Nb+4.93+ is bonded to six O2- atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 39–41°. There are a spread of Nb–O bond distances ranging from 1.91–2.19 Å. In the fourteenth Nb+4.93+ site, Nb+4.93+ is bonded to six O2- atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedra tilt angles range from 39–41°. There are a spread of Nb–O bond distances ranging from 1.91–2.17 Å. Zn2+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Zn–O bond distances ranging from 2.04–2.31 Å. There are forty-two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted see-saw-like geometry to one Li1+, two Nb+4.93+, and one Zn2+ atom. In the second O2- site, O2- is bonded in a distorted see-saw-like geometry to one Li1+, two Nb+4.93+, and one Zn2+ atom. In the third O2- site, O2- is bonded in a distorted see-saw-like geometry to one Li1+, two Nb+4.93+, and one Zn2+ atom. In the fourth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the fifth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the sixth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the seventh O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the eighth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the ninth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the tenth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the eleventh O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the twelfth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the thirteenth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the fourteenth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the fifteenth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the sixteenth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the seventeenth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the eighteenth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the nineteenth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the twentieth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the twenty-first O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the twenty-second O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the twenty-third O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the twenty-fourth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the twenty-fifth O2- site, O2- is bonded in a distorted see-saw-like geometry to one Li1+, two Nb+4.93+, and one Zn2+ atom. In the twenty-sixth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the twenty-seventh O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the twenty-eighth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the twenty-ninth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the thirtieth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the thirty-first O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the thirty-second O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the thirty-third O2- site, O2- is bonded in a distorted see-saw-like geometry to one Li1+, two Nb+4.93+, and one Zn2+ atom. In the thirty-fourth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the thirty-fifth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the thirty-sixth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the thirty-seventh O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the thirty-eighth O2- site, O2- is bonded in a distorted see-saw-like geometry to one Li1+, two Nb+4.93+, and one Zn2+ atom. In the thirty-ninth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the fortieth O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the forty-first O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms. In the forty-second O2- site, O2- is bonded in a distorted see-saw-like geometry to two Li1+ and two Nb+4.93+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Nb2Sb by Materials Project

Nb2Sb crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are fourteen inequivalent Nb sites. In the first Nb site, Nb is bonded in a 2-coordinate geometry to one Nb and two Sb atoms. The Nb–Nb bond length is 2.73 Å. There are one shorter (2.79 Å) and one longer (2.85 Å) Nb–Sb bond lengths. In the second Nb site, Nb is bonded in a 12-coordinate geometry to one Nb and four Sb atoms. The Nb–Nb bond length is 2.72 Å. There are a spread of Nb–Sb bond distances ranging from 2.93–3.51 Å. In the third Nb site, Nb is bonded in a 7-coordinate geometry to four Nb and three Sb atoms. There are one shorter (2.82 Å) and two longer (2.94 Å) Nb–Nb bond lengths. There are a spread of Nb–Sb bond distances ranging from 2.89–3.16 Å. In the fourth Nb site, Nb is bonded in a 8-coordinate geometry to four Nb and four Sb atoms. There are one shorter (2.90 Å) and two longer (2.94 Å) Nb–Nb bond lengths. There are a spread of Nb–Sb bond distances ranging from 2.92–3.03 Å. In the fifth Nb site, Nb is bonded in a 7-coordinate geometry to four Nb and three Sb atoms. There are a spread of Nb–Nb bond distances ranging from 2.76–2.94 Å. There are a spread of Nb–Sb bond distances ranging from 2.93–3.00 Å. In the sixth Nb site, Nb is bonded in a 7-coordinate geometry to four Nb and three Sb atoms. There are a spread of Nb–Nb bond distances ranging from 2.78–2.94 Å. There are a spread of Nb–Sb bond distances ranging from 2.94–2.98 Å. In the seventh Nb site, Nb is bonded in a 7-coordinate geometry to four Nb and three Sb atoms. There are one shorter (2.81 Å) and two longer (2.94 Å) Nb–Nb bond lengths. There are a spread of Nb–Sb bond distances ranging from 2.91–2.99 Å. In the eighth Nb site, Nb is bonded in a 7-coordinate geometry to two Nb and three Sb atoms. There are a spread of Nb–Sb bond distances ranging from 2.96–2.99 Å. In the ninth Nb site, Nb is bonded in a 7-coordinate geometry to four Nb and three Sb atoms. There are one shorter (2.78 Å) and two longer (2.94 Å) Nb–Nb bond lengths. There are a spread of Nb–Sb bond distances ranging from 2.92–2.98 Å. In the tenth Nb site, Nb is bonded in a 7-coordinate geometry to two Nb and three Sb atoms. There are a spread of Nb–Sb bond distances ranging from 2.94–2.97 Å. In the eleventh Nb site, Nb is bonded in a 7-coordinate geometry to four Nb and three Sb atoms. There are a spread of Nb–Nb bond distances ranging from 2.69–2.94 Å. There are a spread of Nb–Sb bond distances ranging from 2.89–3.01 Å. In the twelfth Nb site, Nb is bonded in a 8-coordinate geometry to four Nb and four Sb atoms. There are one shorter (2.82 Å) and two longer (2.94 Å) Nb–Nb bond lengths. There are a spread of Nb–Sb bond distances ranging from 2.87–3.09 Å. In the thirteenth Nb site, Nb is bonded in a 7-coordinate geometry to two Nb and three Sb atoms. There are a spread of Nb–Sb bond distances ranging from 2.93–2.98 Å. In the fourteenth Nb site, Nb is bonded in a 3-coordinate geometry to two Nb and three Sb atoms. There are one shorter (2.91 Å) and two longer (2.93 Å) Nb–Sb bond lengths. There are seven inequivalent Sb sites. In the first Sb site, Sb is bonded in a 10-coordinate geometry to seven Nb and three Sb atoms. There are two shorter (2.94 Å) and one longer (3.34 Å) Sb–Sb bond lengths. In the second Sb site, Sb is bonded in a 6-coordinate geometry to six Nb and three Sb atoms. Both Sb–Sb bond lengths are 2.94 Å. In the third Sb site, Sb is bonded in a 8-coordinate geometry to six Nb atoms. In the fourth Sb site, Sb is bonded in a 12-coordinate geometry to six Nb atoms. In the fifth Sb site, Sb is bonded in a 8-coordinate geometry to six Nb atoms. In the sixth Sb site, Sb is bonded in a 8-coordinate geometry to six Nb atoms. In the seventh Sb site, Sb is bonded in a 9-coordinate geometry to seven Nb atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Nb24Ge7Te48 by Materials Project

(Nb3GeTe6)4(Nb4GeTe8)3 crystallizes in the monoclinic Cm space group. The structure is two-dimensional and consists of two Nb3GeTe6 sheets oriented in the (0, 1, 0) direction and two Nb4GeTe8 sheets oriented in the (0, 1, 0) direction. In each Nb3GeTe6 sheet, there are six inequivalent Nb+2.83+ sites. In the first Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form a mixture of distorted edge and face-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.84–2.96 Å. In the second Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form a mixture of distorted edge and face-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.78–2.98 Å. In the third Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form a mixture of distorted edge and face-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.83–2.96 Å. In the fourth Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form a mixture of distorted edge and face-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.79–2.98 Å. In the fifth Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form distorted edge-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.82–2.92 Å. In the sixth Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form distorted edge-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.81–2.92 Å. There are two inequivalent Ge4+ sites. In the first Ge4+ site, Ge4+ is bonded in a square co-planar geometry to four Te2- atoms. There are a spread of Ge–Te bond distances ranging from 2.81–2.87 Å. In the second Ge4+ site, Ge4+ is bonded in a square co-planar geometry to four Te2- atoms. There are two shorter (2.81 Å) and two longer (2.86 Å) Ge–Te bond lengths. There are twelve inequivalent Te2- sites. In the first Te2- site, Te2- is bonded in a 4-coordinate geometry to three Nb+2.83+ and one Ge4+ atom. In the second Te2- site, Te2- is bonded in a 4-coordinate geometry to three Nb+2.83+ and one Ge4+ atom. In the third Te2- site, Te2- is bonded in a 3-coordinate geometry to three Nb+2.83+ atoms. In the fourth Te2- site, Te2- is bonded in a 4-coordinate geometry to three Nb+2.83+ and one Ge4+ atom. In the fifth Te2- site, Te2- is bonded in a 4-coordinate geometry to three Nb+2.83+ and one Ge4+ atom. In the sixth Te2- site, Te2- is bonded in a 4-coordinate geometry to three Nb+2.83+ and one Ge4+ atom. In the seventh Te2- site, Te2- is bonded in a 4-coordinate geometry to three Nb+2.83+ and one Ge4+ atom. In the eighth Te2- site, Te2- is bonded in a 3-coordinate geometry to three Nb+2.83+ atoms. In the ninth Te2- site, Te2- is bonded in a 3-coordinate geometry to three Nb+2.83+ atoms. In the tenth Te2- site, Te2- is bonded in a 4-coordinate geometry to three Nb+2.83+ and one Ge4+ atom. In the eleventh Te2- site, Te2- is bonded in a 3-coordinate geometry to three Nb+2.83+ atoms. In the twelfth Te2- site, Te2- is bonded in a 4-coordinate geometry to three Nb+2.83+ and one Ge4+ atom. In each Nb4GeTe8 sheet, there are twelve inequivalent Nb+2.83+ sites. In the first Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form distorted edge-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.82–2.86 Å. In the second Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form distorted edge-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.81–2.93 Å. In the third Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form a mixture of distorted edge and face-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.76–3.00 Å. In the fourth Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form a mixture of distorted edge and face-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.78–2.97 Å. In the fifth Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form distorted edge-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.83–2.91 Å. In the sixth Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form a mixture of distorted edge and face-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.80–3.00 Å. In the seventh Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form a mixture of distorted edge and face-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.81–2.90 Å. In the eighth Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form distorted edge-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.81–2.91 Å. In the ninth Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form a mixture of distorted edge and face-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.81–2.89 Å. In the tenth Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form a mixture of distorted edge and face-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.84–2.98 Å. In the eleventh Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form a mixture of distorted edge and face-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.81–2.98 Å. In the twelfth Nb+2.83+ site, Nb+2.83+ is bonded to six Te2- atoms to form a mixture of distorted edge and face-sharing NbTe6 pentagonal pyramids. There are a spread of Nb–Te bond distances ranging from 2.85–2.96 Å. There are three inequivalent Ge4+ sites. In the first Ge4+ site, Ge4+ is bonded in a square co-planar geometry to four Te2- atoms. There are two shorter (2.81 Å) and two longer (2.87 Å) Ge–Te bond lengths. In the second Ge4+ site, Ge4+ is bonded in a distorted square co-planar geometry to four Te2- atoms. There are two shorter (2.81 Å) and two longer (2.90 Å) Ge–Te bond lengths. In the third Ge4+ site, Ge4+ is bonded in a square co-planar geometry to four Te2- atoms. There are two shorter (2.80 Å) and two longer (2.84 Å) Ge–Te bond lengths. There are twelve inequivalent Te2- sites. In the first Te2- site, Te2- is bonded in a 3-coordinate geometry to three Nb+2.83+ atoms. In the second Te2- site, Te2- is bonded in a 4-coordinate geometry to three Nb+2.83+ and one Ge4+ atom. In the third Te2- site, Te2- is bonded in a 3-coordinate geometry to three Nb+2.83+ atoms. In the fourth Te2- site, Te2- is bonded in a 3-coordinate geometry to three Nb+2.83+ atoms. In the fifth Te2- site, Te2- is bonded in a 3-coordinate geometry to three Nb+2.83+ atoms. In the sixth Te2- site, Te2- is bonded in a 3-coordinate geometry to three Nb+2.83+ atoms. In the seventh Te2- site, Te2- is bonded in a 4-coordinate geometry to three Nb+2.83+ and one Ge4+ atom. In the eighth Te2- site, Te2- is bonded in a 4-coordinate geometry to three Nb+2.83+ and one Ge4+ atom. In the ninth Te2- site, Te2- is bonded in a 3-coordinate geometry to three Nb+2.83+ atoms. In the tenth Te2- site, Te2- is bonded in a 4-coordinate geometry to three Nb+2.83+ and one Ge4+ atom. In the eleventh Te2- site, Te2- is bonded in a 4-coordinate geometry to three Nb+2.83+ and one Ge4+ atom. In the twelfth Te2- site, Te2- is bonded in a 4-coordinate geometry to three Nb+2.83+ and one Ge4+ atom.

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