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At least 91 records · Page 5
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on LiB12PC by Materials Project

LiB6CP(B)6 crystallizes in the orthorhombic Ima2 space group. The structure is zero-dimensional and consists of twenty-four boron molecules and four LiB6CP clusters. In each LiB6CP cluster, Li1+ is bonded in a distorted single-bond geometry to one C4- and one P3- atom. The Li–C bond length is 2.74 Å. The Li–P bond length is 2.68 Å. There are four inequivalent B+0.50+ sites. In the first B+0.50+ site, B+0.50+ is bonded in a single-bond geometry to one C4- atom. The B–C bond length is 1.67 Å. In the second B+0.50+ site, B+0.50+ is bonded in a single-bond geometry to one P3- atom. The B–P bond length is 1.91 Å. In the third B+0.50+ site, B+0.50+ is bonded in a single-bond geometry to one C4- atom. The B–C bond length is 1.66 Å. In the fourth B+0.50+ site, B+0.50+ is bonded in a single-bond geometry to one P3- atom. The B–P bond length is 1.91 Å. C4- is bonded in a tetrahedral geometry to one Li1+, three B+0.50+, and one P3- atom. The C–P bond length is 1.87 Å. P3- is bonded in a 5-coordinate geometry to one Li1+, three B+0.50+, and one C4- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2022

Developing Reaction Chemistry Models from Reactive Molecular Dynamics: TATB

Reactive Molecular Dynamic (RMD) are used to simulate the cook-off chemistry of TATB at a variety of fixed density and fixed temperature conditions. The chemical transformations are monitored using a Coordination Geometry Analysis (CGA) approach which tracks which atom types are bonded to each specific atom. This particularly identifies oxidation state changes that occur during the transformations. Correlations between these different chemical changes are identified using a Non-negative Matrix Factorization (NMF) approach. These identify reduced order chemistry models for the TATB system which contains six components whose concentration profiles are a function of both the temperature and density/pressure. The time histories of these transformations appear to show exponential growth/decay properties that could be fit with Arrhenius rates. These components should form the basis of deflagration rate models for these materials which could then be used in mesoscale simulations to analyze accidental initiation, shock-to-detonation and detonation propagation.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2022

Mapping 1D Confined Electromagnetic Edge States in 2D Monolayer Semiconducting MoS 2 Using 4D-STEM

Here, four-dimensional (4D) scanning transmission electron microscopy is used to study the electric fields at the edges of 2D semiconducting monolayer MoS2. Sub-nanometer 1D features in the 2D electric field maps are observed at the outermost region along zigzag edges and also along nanowire MoS-terminated MoS 2 edges. Atomic-scale oscillations are detected in the magnitude of the 1D electromagnetic edge state, with spatial variations that depend on the specific periodic edge reconstructions. Electric field reconstructions, along with integrated differential phase contrast reconstructions, reveal the presence of low Z number atoms terminating many of the uniform edges, which are difficult to detect by annular dark field scanning transmission electron microscopy due to its limited dynamic range. Density functional theory calculations support the formation of periodic 1D edge states and also show that enhancement of the electric field magnitude can occur for some edge terminations. The experimentally observed electric fields at the edges are attributed to the absence of an opposing electric field from a nearest neighbor atom when the electron beam propagates through the 2D monolayer and interacts. These results show the potential of 4D-STEM to map the atomic scale structure and fluctuations of electric fields around edge atoms with different bonding states than bulk atoms in 2D materials, beyond conventional imaging.

2D materials↗
DOE OSTI2021

Single Atom Catalysts: A Review of Characterization Methods

Abstract Single atom catalysts (SACs) harbor a potential to exceed nanoparticle catalysts in terms of activity, stability and selectivity in a growing number of chemical reactions. Although their investigation is attracting significant attention, important fundamental questions focusing on key physicochemical properties of SACs (e. g., structure – property relationships, structural dynamics, reaction‐driven restructuring) remain unanswered. A main challenge for research in the field is how to reliably characterize the environments of single atoms in the presence of complicating factors such as low weight loadings, strong metal‐support interactions, and atomic and multiscale heterogeneity of bonding in the single atom sites. This review addresses this challenge – identifying catalytically relevant features of physicochemical properties of single atoms (charge state, electronic structure, atomic configuration, bonding interactions with a support) and surveying advanced tools/methods for characterizing them. The review places a strong emphasis on multimodal methods exploiting X‐ray absorption, emission and photoelectron spectroscopies, and provides several examples from the authors’ research that demonstrate their use as powerful tools for SAC characterization.

Kottwitz, Matthew↗
DOE OSTI2020

Materials Data on ClO2 by Materials Project

ClO2 crystallizes in the orthorhombic Pbca space group. The structure is zero-dimensional and consists of eight hypochlorous acid;hydrate molecules. there are two inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Cl atom. The O–Cl bond length is 1.50 Å. In the second O site, O is bonded in a single-bond geometry to one Cl atom. The O–Cl bond length is 1.48 Å. Cl is bonded in a bent 120 degrees geometry to two O atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H2O by Materials Project

H2O crystallizes in the trigonal R-3 space group. The structure is zero-dimensional and consists of thirty-six water molecules. there are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. O2- is bonded in a water-like geometry to two H1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H2O by Materials Project

H2O is Keatite structured and crystallizes in the tetragonal P4_12_12 space group. The structure is zero-dimensional and consists of twelve water molecules. there are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. O2- is bonded in a water-like geometry to two H1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H2O by Materials Project

H2O is Lonsdaleite structured and crystallizes in the hexagonal P6_3cm space group. The structure is zero-dimensional and consists of twelve water molecules. there are two inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a distorted single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.01 Å. O2- is bonded in a water-like geometry to two H1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsRbAs by Materials Project

CsRbAs is Copper structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one CsRbAs cluster. Cs1+ is bonded in a distorted single-bond geometry to one As2- atom. The Cs–As bond length is 2.61 Å. Rb1+ is bonded in a distorted single-bond geometry to one As2- atom. The Rb–As bond length is 2.61 Å. As2- is bonded in a linear geometry to one Cs1+ and one Rb1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on C3N by Materials Project

C3N is Hg_xSn structured and crystallizes in the orthorhombic Pnma space group. The structure is zero-dimensional and consists of four trimethylamine molecules. there are two inequivalent C1+ sites. In the first C1+ site, C1+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.33 Å. In the second C1+ site, C1+ is bonded in a single-bond geometry to one N3- atom. The C–N bond length is 1.43 Å. N3- is bonded in a distorted T-shaped geometry to three C1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Te(HO)6 by Materials Project

Te(OH)6 crystallizes in the orthorhombic Fmm2 space group. The structure is two-dimensional and consists of two Te(OH)6 sheets oriented in the (0, 0, 1) direction. there are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the second H1+ site, H1+ is bonded in a distorted single-bond geometry to two O2- atoms. There is one shorter (1.00 Å) and one longer (1.70 Å) H–O bond length. In the third H1+ site, H1+ is bonded in a distorted linear geometry to two O2- atoms. There is one shorter (1.04 Å) and one longer (1.52 Å) H–O bond length. Te6+ is bonded in an octahedral geometry to six O2- atoms. There are a spread of Te–O bond distances ranging from 1.84–2.12 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a trigonal planar geometry to two equivalent H1+ and one Te6+ atom. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one H1+ and one Te6+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two H1+ and one Te6+ atom. In the fourth O2- site, O2- is bonded in a distorted water-like geometry to two equivalent H1+ and one Te6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K5NO4 by Materials Project

K5NO4 crystallizes in the triclinic P1 space group. The structure is two-dimensional and consists of one K5NO4 sheet oriented in the (0, 0, 1) direction. there are five inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a single-bond geometry to one O2- atom. The K–O bond length is 2.50 Å. In the second K1+ site, K1+ is bonded in a distorted trigonal planar geometry to three O2- atoms. There are two shorter (2.65 Å) and one longer (2.66 Å) K–O bond lengths. In the third K1+ site, K1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of K–O bond distances ranging from 2.70–3.06 Å. In the fourth K1+ site, K1+ is bonded to four O2- atoms to form distorted corner-sharing KO4 tetrahedra. There are a spread of K–O bond distances ranging from 2.59–2.85 Å. In the fifth K1+ site, K1+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of K–O bond distances ranging from 2.62–2.96 Å. N3+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of N–O bond distances ranging from 1.34–1.36 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to three K1+ and one N3+ atom. In the second O2- site, O2- is bonded to three K1+ and one N3+ atom to form distorted OK3N trigonal pyramids that share a cornercorner with one OK5 trigonal bipyramid and corners with two equivalent OK3N trigonal pyramids. In the third O2- site, O2- is bonded in a 5-coordinate geometry to four K1+ and one N3+ atom. In the fourth O2- site, O2- is bonded to five K1+ atoms to form distorted OK5 trigonal bipyramids that share corners with two equivalent OK5 trigonal bipyramids and a cornercorner with one OK3N trigonal pyramid.

36 MATERIALS SCIENCE↗
DOE OSTI2025

Atomic-scale insights into topotactic transformations in an extra-large-pore zeolite using time-resolved 3D electron diffraction

Understanding the atomic-scale structural dynamics of phase transformations is crucial for developing materials and tailoring their properties. However, many materials are obtained as polycrystalline powders with large unit cells and/or complex structures, making it challenging to investigate detailed structural changes using conventional X-ray diffraction techniques. Here we employ time-resolved three-dimensional electron diffraction to reveal the topotactic reactions and transformations that convert the extra-large-pore silicate zeolite ECNU-45 into ECNU-46. ECNU-45 features three-dimensional interconnecting 24 × 10 × 10-ring channels, while ECNU-46 consists of one-dimensional 24-ring channels connected to 10-ring pockets. ECNU-45 and ECNU-46 are both examples of pure silicate zeolites with pore openings larger than 22-ring. Our findings indicate changes at six distinct tetrahedral silicon sites, involving atom displacement, addition and removal of framework atoms through bond breakage and formation. This work presents the synthesis of zeolites and also provides atomic-level insights into the dynamic processes of topotactic reactions. Our results have implications for advancing materials engineering and understanding complex solid-state reactions at an atomic scale.

Inorganic chemistry↗
DOE OSTI2023

Chlorination of Hydrogenated Silicon Nanosheets Revealed by Solid-State Nuclear Magnetic Resonance Spectroscopy

We report two-dimensional silicon nanosheets (Si-NS) synthesized by topotactic deintercalation of CaSi 2 are hypothesized to consist of buckled layers of sp 3 -hybridized silicon atoms that are bonded to three other framework Si atoms and a terminal atom or functional group such as H, Cl, or OH. Here, we apply 1 H{ 35 Cl} and 29 Si{ 35 Cl} Resonance-Echo Saturation-Pulse DOuble-Resonance (RESPDOR) solid-state NMR experiments to directly confirm the presence of chlorinated Si atoms within Si-NS. Plotting the 1 H{ 35 Cl} RESPDOR dephasing as a function of the 35 Cl saturation pulse offset reveals that the 35 Cl quadrupolar coupling constant (C Q ) is 38 MHz, consistent with Cl atoms that are covalently bonded to silicon. Modeling the 1 H{ 35 Cl} RESPDOR dephasing curve shows that the Si–Si interlayer spacing is approximately 6 Å. Plane-wave density functional theory (DFT) calculations show that the direct band gap transition of the Si-NS decreases with increasing chlorination and hydroxylation, suggesting that the band gap of Si-NS can be tuned by modifying the terminal atoms or functional groups.

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
DOE OSTI2020

Materials Data on Na2V9MoH35(N2O19)2 by Materials Project

(Na(H2O)5)2V9MoO28(NH4)3NH3 crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one ammonia molecule, three ammonium molecules, one Na(H2O)5 cluster, and one V9MoO28 cluster. In the Na(H2O)5 cluster, there are two inequivalent Na sites. In the first Na site, Na is bonded to six O atoms to form edge-sharing NaO6 octahedra. There are a spread of Na–O bond distances ranging from 2.36–2.53 Å. In the second Na site, Na is bonded to six O atoms to form edge-sharing NaO6 octahedra. There are a spread of Na–O bond distances ranging from 2.40–2.48 Å. There are twenty inequivalent H sites. In the first H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the second H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the third H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.99 Å. In the fourth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the fifth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the sixth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the seventh H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the eighth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the ninth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the tenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the eleventh H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the twelfth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the thirteenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the fourteenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the fifteenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the sixteenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the seventeenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the eighteenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.99 Å. In the nineteenth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. In the twentieth H site, H is bonded in a single-bond geometry to one O atom. The H–O bond length is 0.98 Å. There are ten inequivalent O sites. In the first O site, O is bonded in a distorted water-like geometry to one Na and two H atoms. In the second O site, O is bonded in a distorted water-like geometry to two Na and two H atoms. In the third O site, O is bonded in a distorted water-like geometry to one Na and two H atoms. In the fourth O site, O is bonded in a distorted water-like geometry to one Na and two H atoms. In the fifth O site, O is bonded in a distorted water-like geometry to one Na and two H atoms. In the sixth O site, O is bonded in a distorted water-like geometry to one Na and two H atoms. In the seventh O site, O is bonded in a distorted water-like geometry to one Na and two H atoms. In the eighth O site, O is bonded in a distorted water-like geometry to one Na and two H atoms. In the ninth O site, O is bonded in a distorted water-like geometry to two Na and two H atoms. In the tenth O site, O is bonded in a distorted water-like geometry to one Na and two H atoms. In the V9MoO28 cluster, there are nine inequivalent V sites. In the first V site, V is bonded in a 6-coordinate geometry to six O atoms. There are a spread of V–O bond distances ranging from 1.63–2.32 Å. In the second V site, V is bonded in a 6-coordinate geometry to six O atoms. There are a spread of V–O bond distances ranging from 1.67–2.25 Å. In the third V site, V is bonded in a 6-coordinate geometry to six O atoms. There are a spread of V–O bond distances ranging from 1.62–2.42 Å. In the fourth V site, V is bonded in a 6-coordinate geometry to six O atoms. There are a spread of V–O bond distances ranging from 1.64–2.38 Å. In the fifth V site, V is bonded to six O atoms to form distorted edge-sharing VO6 octahedra. There are a spread of V–O bond distances ranging from 1.73–2.12 Å. In the sixth V site, V is bonded to six O atoms to form distorted edge-sharing VO6 octahedra. There are a spread of V–O bond distances ranging from 1.73–2.12 Å. In the seventh V site, V is bonded in a 6-coordinate geometry to six O atoms. There are a spread of V–O bond distances ranging from 1.65–2.34 Å. In the eighth V site, V is bonded in a 6-coordinate geometry to six O atoms. There are a spread of V–O bond distances ranging from 1.61–2.47 Å. In the ninth V site, V is bonded in a 6-coordinate geometry to six O atoms. There are a spread of V–O bond distances ranging from 1.66–2.31 Å. Mo is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Mo–O bond distances ranging from 1.74–2.33 Å. There are twenty-eight inequivalent O sites. In the first O site, O is bonded in a bent 120 degrees geometry to two V atoms. In the second O site, O is bonded in a single-bond geometry to one V atom. In the third O site, O is bonded to six V atoms to form distorted edge-sharing OV6 octahedra. In the fourth O site, O is bonded in a single-bond geometry to one V atom. In the fifth O site, O is bonded in a bent 120 degrees geometry to two V atoms. In the sixth O site, O is bonded in a bent 120 degrees geometry to two V atoms. In the seventh O site, O is bonded in a trigonal non-coplanar geometry to two V and one Mo atom. In the eighth O site, O is bonded in a trigonal non-coplanar geometry to three V atoms. In the ninth O site, O is bonded in a bent 120 degrees geometry to two V atoms. In the tenth O site, O is bonded in a bent 120 degrees geometry to two V atoms. In the eleventh O site, O is bonded in a single-bond geometry to one V atom. In the twelfth O site, O is bonded in a water-like geometry to two V atoms. In the thirteenth O site, O is bonded in a bent 120 degrees geometry to two V atoms. In the fourteenth O site, O is bonded in a single-bond geometry to one V atom. In the fifteenth O site, O is bonded in a single-bond geometry to one V atom. In the sixteenth O site, O is bonded in a bent 120 degrees geometry to two V atoms. In the seventeenth O site, O is bonded in a bent 120 degrees geometry to two V atoms. In the eighteenth O site, O is bonded in a single-bond geometry to one V atom. In the nineteenth O site, O is bonded in a bent 120 degrees geometry to two V atoms. In the twentieth O site, O is bonded in a bent 120 degrees geometry to one V and one Mo atom. In the twenty-first O site, O is bonded in a trigonal non-coplanar geometry to two V and one Mo atom. In the twenty-second O site, O is bonded in a trigonal non-coplanar geometry to three V atoms. In the twenty-third O site, O is bonded in a bent 120 degrees geometry to two V atoms. In the twenty-fourth O site, O is bonded in a bent 120 degrees geometry to two V atoms. In the twenty-fifth O site, O is bonded in a single-bond geometry to one Mo atom. In the twenty-sixth O site, O is bonded to five V and one Mo atom to form edge-sharing OV5Mo octahedra. In the twenty-seventh O site, O is bonded in a single-bond geometry to one V atom. In the twenty-eighth O site, O is bonded in a bent 120 degrees geometry to one V and one Mo atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CuH10SO9 by Materials Project

Cu(H3O)2CuH14(SO8)2 crystallizes in the triclinic P-1 space group. The structure is one-dimensional and consists of one Cu(H3O)2 cluster and one CuH14(SO8)2 ribbon oriented in the (1, 0, 0) direction. In the Cu(H3O)2 cluster, Cu2+ is bonded in a distorted linear geometry to two equivalent H1+ and two equivalent O2- atoms. Both Cu–H bond lengths are 2.21 Å. Both Cu–O bond lengths are 1.80 Å. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one H1+ atom. The H–H bond length is 0.75 Å. In the second H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the third H1+ site, H1+ is bonded in a linear geometry to one Cu2+ and one H1+ atom. O2- is bonded in a bent 120 degrees geometry to one Cu2+ and one H1+ atom. In the CuH14(SO8)2 ribbon, Cu2+ is bonded to six O2- atoms to form distorted CuO6 octahedra that share corners with two equivalent SO4 tetrahedra. There are a spread of Cu–O bond distances ranging from 1.91–2.61 Å. There are seven inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the second H1+ site, H1+ is bonded in a distorted linear geometry to two O2- atoms. There is one shorter (1.05 Å) and one longer (1.55 Å) H–O bond length. In the third H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. In the fourth H1+ site, H1+ is bonded in a distorted bent 150 degrees geometry to two O2- atoms. There is one shorter (1.04 Å) and one longer (1.53 Å) H–O bond length. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.98 Å. In the sixth H1+ site, H1+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.02 Å) and one longer (1.53 Å) H–O bond length. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 0.99 Å. S6+ is bonded to four O2- atoms to form SO4 tetrahedra that share a cornercorner with one CuO6 octahedra. The corner-sharing octahedral tilt angles are 52°. There are a spread of S–O bond distances ranging from 1.45–1.66 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one H1+ and one S6+ atom. In the second O2- site, O2- is bonded in a trigonal non-coplanar geometry to three H1+ atoms. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Cu2+ and one S6+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Cu2+ and two H1+ atoms. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to three H1+ atoms. In the sixth O2- site, O2- is bonded in a single-bond geometry to one S6+ atom. In the seventh O2- site, O2- is bonded in a distorted water-like geometry to one H1+ and one S6+ atom. In the eighth O2- site, O2- is bonded in a bent 120 degrees geometry to one Cu2+ and one O2- atom. The O–O bond length is 1.25 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on S by Materials Project

S crystallizes in the trigonal P3 space group. The structure is zero-dimensional and consists of six trisulfane molecules. there are three inequivalent S sites. In the first S site, S is bonded in a single-bond geometry to one S atom. The S–S bond length is 1.94 Å. In the second S site, S is bonded in a bent 120 degrees geometry to two S atoms. The S–S bond length is 1.93 Å. In the third S site, S is bonded in a single-bond geometry to one S atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sc11Os4 by Materials Project

Sc16Os7Sc6Os crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of four Sc6Os clusters and one Sc16Os7 framework. In each Sc6Os cluster, Sc is bonded in a single-bond geometry to one Os atom. The Sc–Os bond length is 2.66 Å. Os is bonded in an octahedral geometry to six equivalent Sc atoms. In the Sc16Os7 framework, there are two inequivalent Sc sites. In the first Sc site, Sc is bonded in a distorted trigonal planar geometry to three equivalent Os atoms. All Sc–Os bond lengths are 2.74 Å. In the second Sc site, Sc is bonded to four Os atoms to form a mixture of distorted corner and edge-sharing ScOs4 tetrahedra. There are one shorter (2.72 Å) and three longer (2.96 Å) Sc–Os bond lengths. There are two inequivalent Os sites. In the first Os site, Os is bonded in a body-centered cubic geometry to eight equivalent Sc atoms. In the second Os site, Os is bonded in a 12-coordinate geometry to eight Sc atoms.

36 MATERIALS SCIENCE↗