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At least 1,513 records · Page 84
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DOE OSTI2020

Materials Data on Re2S2NCl11 by Materials Project

Re2Cl9NS2Cl2 crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of four NS2Cl2 clusters and four Re2Cl9 clusters. In each NS2Cl2 cluster, N5+ is bonded in a bent 150 degrees geometry to two equivalent S2- atoms. Both N–S bond lengths are 1.54 Å. S2- is bonded in a distorted water-like geometry to one N5+ and one Cl1- atom. The S–Cl bond length is 2.02 Å. Cl1- is bonded in a single-bond geometry to one S2- atom. In each Re2Cl9 cluster, Re5+ is bonded to six Cl1- atoms to form face-sharing ReCl6 octahedra. There are a spread of Re–Cl bond distances ranging from 2.31–2.43 Å. There are five inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 2-coordinate geometry to two equivalent Re5+ atoms. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Re5+ atom. In the third Cl1- site, Cl1- is bonded in a 2-coordinate geometry to two equivalent Re5+ atoms. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one Re5+ atom. In the fifth Cl1- site, Cl1- is bonded in a single-bond geometry to one Re5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on OsXe(O2F3)2 by Materials Project

XeOF4OsO3F2 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of one OsO3F2 cluster and two XeOF4 clusters. In the OsO3F2 cluster, Os is bonded in a 6-coordinate geometry to three O and three F atoms. All Os–O bond lengths are 1.71 Å. There are a spread of Os–F bond distances ranging from 1.96–2.16 Å. There are three inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Os atom. In the second O site, O is bonded in a single-bond geometry to one Os atom. In the third O site, O is bonded in a single-bond geometry to one Os atom. There are two inequivalent F sites. In the first F site, F is bonded in a water-like geometry to two equivalent Os atoms. In the second F site, F is bonded in a single-bond geometry to one Os atom. In each XeOF4 cluster, Xe is bonded in a square pyramidal geometry to one O and four F atoms. The Xe–O bond length is 1.83 Å. There are two shorter (2.03 Å) and two longer (2.04 Å) Xe–F bond lengths. O is bonded in a single-bond geometry to one Xe atom. There are four inequivalent F sites. In the first F site, F is bonded in a single-bond geometry to one Xe atom. In the second F site, F is bonded in a single-bond geometry to one Xe atom. In the third F site, F is bonded in a single-bond geometry to one Xe atom. In the fourth F site, F is bonded in a single-bond geometry to one Xe atom.

36 MATERIALS SCIENCE↗
DOE OSTI2025

Quantum many-body linear algebra, Hamiltonian moments, and a coupled-cluster inspired framework

Here, we propose a general strategy to develop quantum many-body approximations of primitives in linear algebra algorithms. As a practical example, we introduce a coupled-cluster inspired framework to produce approximate Hamiltonian moments and demonstrate its application in various linear algebra algorithms for ground state estimation. Through numerical examples, we illustrate the difference between the ground-state energies arising from quantum many-body linear algebra and those from the analogous many-body perturbation theory. Our results support the general idea of designing quantum many-body approximations outside of perturbation theory, providing a route to new algorithms and approximations.

Algorithms and data structure↗
DOE OSTI2020

Materials Data on TiS4(NCl)5 by Materials Project

TiCl5N5S4 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four N5S4 clusters and two TiCl5 clusters. In each N5S4 cluster, there are five inequivalent N+1.80+ sites. In the first N+1.80+ site, N+1.80+ is bonded in a bent 120 degrees geometry to two S2- atoms. There is one shorter (1.57 Å) and one longer (1.70 Å) N–S bond length. In the second N+1.80+ site, N+1.80+ is bonded in a bent 120 degrees geometry to two S2- atoms. There is one shorter (1.57 Å) and one longer (1.70 Å) N–S bond length. In the third N+1.80+ site, N+1.80+ is bonded in a bent 120 degrees geometry to two S2- atoms. Both N–S bond lengths are 1.62 Å. In the fourth N+1.80+ site, N+1.80+ is bonded in a bent 120 degrees geometry to two S2- atoms. There is one shorter (1.57 Å) and one longer (1.70 Å) N–S bond length. In the fifth N+1.80+ site, N+1.80+ is bonded in a bent 120 degrees geometry to two S2- atoms. There is one shorter (1.57 Å) and one longer (1.70 Å) N–S bond length. There are four inequivalent S2- sites. In the first S2- site, S2- is bonded in a trigonal non-coplanar geometry to three N+1.80+ atoms. In the second S2- site, S2- is bonded in a trigonal non-coplanar geometry to three N+1.80+ atoms. In the third S2- site, S2- is bonded in a bent 120 degrees geometry to two N+1.80+ atoms. In the fourth S2- site, S2- is bonded in a bent 120 degrees geometry to two N+1.80+ atoms. In each TiCl5 cluster, Ti4+ is bonded to six Cl1- atoms to form edge-sharing TiCl6 octahedra. There are a spread of Ti–Cl bond distances ranging from 2.27–2.49 Å. There are five inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Ti4+ atom. In the second Cl1- site, Cl1- is bonded in a water-like geometry to two equivalent Ti4+ atoms. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Ti4+ atom. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one Ti4+ atom. In the fifth Cl1- site, Cl1- is bonded in a single-bond geometry to one Ti4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TaP4(S2Cl)5 by Materials Project

TaCl5(P2S5)2 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of two P2S5 clusters and one TaCl5 cluster. In each P2S5 cluster, there are four inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four S2- atoms to form corner-sharing PS4 tetrahedra. There are one shorter (1.92 Å) and three longer (2.12 Å) P–S bond lengths. In the second P5+ site, P5+ is bonded to four S2- atoms to form corner-sharing PS4 tetrahedra. There are one shorter (1.92 Å) and three longer (2.12 Å) P–S bond lengths. In the third P5+ site, P5+ is bonded to four S2- atoms to form corner-sharing PS4 tetrahedra. There are one shorter (1.92 Å) and three longer (2.12 Å) P–S bond lengths. In the fourth P5+ site, P5+ is bonded to four S2- atoms to form corner-sharing PS4 tetrahedra. There are one shorter (1.92 Å) and three longer (2.12 Å) P–S bond lengths. There are ten inequivalent S2- sites. In the first S2- site, S2- is bonded in a water-like geometry to two P5+ atoms. In the second S2- site, S2- is bonded in a single-bond geometry to one P5+ atom. In the third S2- site, S2- is bonded in a single-bond geometry to one P5+ atom. In the fourth S2- site, S2- is bonded in a single-bond geometry to one P5+ atom. In the fifth S2- site, S2- is bonded in a water-like geometry to two P5+ atoms. In the sixth S2- site, S2- is bonded in a water-like geometry to two P5+ atoms. In the seventh S2- site, S2- is bonded in a water-like geometry to two P5+ atoms. In the eighth S2- site, S2- is bonded in a water-like geometry to two P5+ atoms. In the ninth S2- site, S2- is bonded in a single-bond geometry to one P5+ atom. In the tenth S2- site, S2- is bonded in a water-like geometry to two P5+ atoms. In the TaCl5 cluster, Ta5+ is bonded to six Cl1- atoms to form edge-sharing TaCl6 octahedra. There are a spread of Ta–Cl bond distances ranging from 2.27–2.59 Å. There are five inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Ta5+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Ta5+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Ta5+ atom. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one Ta5+ atom. In the fifth Cl1- site, Cl1- is bonded in a water-like geometry to two equivalent Ta5+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2026

The S-PLUS Fifth Data Release: Over 4500 Square Degrees of the Southern Sky and a Multicolor View of the Hydra and Antlia Galaxy Clusters

Abstract We present the fifth data release (DR5) of the Southern Photometric Local Universe Survey (S-PLUS), covering 4592 deg 2 across 2491 fields. Observations were conducted with the T80-South, a Brazilian robotic telescope equipped with the Javalambre 12-filter system, containing five broadband and seven narrowband filters. Data products feature FITS images and extensive catalogs containing fluxes, magnitudes, and shape parameters for over 113 million detections. In addition, several value-added catalogs are provided, offering photometric redshifts (photo- zs ), object classifications, masks, and extinction coefficients. For the first time, this release includes coverage of 110 deg 2 along the Galactic disk, facilitating new research into Galactic structure and stellar populations. The release also provides full coverage of the Hydra Supercluster and numerous other nearby clusters with improved data reduction and calibration, enhancing photo- z accuracy, which is vital for large-scale structure studies. A preliminary analysis of the Hydra and Antlia galaxy clusters up to 5 × R 200 yields an updated catalog of 1706 cluster members based on both spectroscopic and high-quality photo- zs . Our photometric data shows that both clusters have a similar proportion of galaxies with an H α excess relative to their clustercentric distance, though Hydra has a higher fraction near its center. Additionally, the spatial distribution of all objects in our sample highlights a bridge connecting both clusters. We verify that S-PLUS DR5 provides a solid foundation for future scientific investigations, ranging from solar system studies to cosmology.

Vinicius Rodrigues de Lima, Erik [Universidade de ↗
DOE OSTI2020

Materials Data on HIO3 by Materials Project

HIO3 is alpha Niobium phosphide-derived structured and crystallizes in the orthorhombic Pbca space group. The structure is zero-dimensional and consists of four HIO3 clusters. H1+ is bonded in a single-bond geometry to two O2- atoms. There is one shorter (1.01 Å) and one longer (1.71 Å) H–O bond length. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one I5+ atom. The O–I bond length is 1.84 Å. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one H1+ and one I5+ atom. The O–I bond length is 1.91 Å. In the third O2- site, O2- is bonded in a 1-coordinate geometry to one H1+ and one I5+ atom. The O–I bond length is 1.82 Å. I5+ is bonded in a 6-coordinate geometry to three O2- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ni3Te(MoO7)6 by Materials Project

Te(MoO4)6(NiO6)3 is T-50 Boron-derived structured and crystallizes in the trigonal R-3c space group. The structure is zero-dimensional and consists of eighteen NiO6 clusters and six Te(MoO4)6 clusters. In each NiO6 cluster, Ni is bonded in an octahedral geometry to six O atoms. There are a spread of Ni–O bond distances ranging from 1.81–1.85 Å. There are three inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Ni atom. In the second O site, O is bonded in a single-bond geometry to one Ni atom. In the third O site, O is bonded in a single-bond geometry to one Ni atom. In each Te(MoO4)6 cluster, Mo is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Mo–O bond distances ranging from 1.73–2.34 Å. Te is bonded in an octahedral geometry to six equivalent O atoms. All Te–O bond lengths are 1.96 Å. There are four inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Mo atom. In the second O site, O is bonded in a bent 120 degrees geometry to two equivalent Mo atoms. In the third O site, O is bonded in a single-bond geometry to one Mo atom. In the fourth O site, O is bonded in a distorted trigonal non-coplanar geometry to two equivalent Mo and one Te atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sb2AsAuXeF14 by Materials Project

XeAuAsF3Sb2F11 crystallizes in the orthorhombic Pna2_1 space group. The structure is zero-dimensional and consists of four Sb2F11 clusters and four XeAuAsF3 clusters. In each Sb2F11 cluster, there are two inequivalent Sb sites. In the first Sb site, Sb is bonded to six F atoms to form corner-sharing SbF6 octahedra. The corner-sharing octahedral tilt angles are 23°. There are a spread of Sb–F bond distances ranging from 1.89–2.08 Å. In the second Sb site, Sb is bonded to six F atoms to form corner-sharing SbF6 octahedra. The corner-sharing octahedral tilt angles are 23°. There are a spread of Sb–F bond distances ranging from 1.90–2.09 Å. There are eleven inequivalent F sites. In the first F site, F is bonded in a bent 150 degrees geometry to two Sb atoms. In the second F site, F is bonded in a single-bond geometry to one Sb atom. In the third F site, F is bonded in a single-bond geometry to one Sb atom. In the fourth F site, F is bonded in a single-bond geometry to one Sb atom. In the fifth F site, F is bonded in a single-bond geometry to one Sb atom. In the sixth F site, F is bonded in a single-bond geometry to one Sb atom. In the seventh F site, F is bonded in a single-bond geometry to one Sb atom. In the eighth F site, F is bonded in a single-bond geometry to one Sb atom. In the ninth F site, F is bonded in a single-bond geometry to one Sb atom. In the tenth F site, F is bonded in a single-bond geometry to one Sb atom. In the eleventh F site, F is bonded in a single-bond geometry to one Sb atom. In each XeAuAsF3 cluster, Xe is bonded in a single-bond geometry to one Au atom. The Xe–Au bond length is 2.67 Å. Au is bonded in a linear geometry to one Xe and one As atom. The Au–As bond length is 2.35 Å. As is bonded in a 4-coordinate geometry to one Au and three F atoms. All As–F bond lengths are 1.72 Å. There are three inequivalent F sites. In the first F site, F is bonded in a single-bond geometry to one As atom. In the second F site, F is bonded in a single-bond geometry to one As atom. In the third F site, F is bonded in a single-bond geometry to one As atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Re2Cl5O4 by Materials Project

ReO3ClReOCl4 crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of one ReO3Cl cluster and one ReOCl4 cluster. In the ReO3Cl cluster, Re+6.50+ is bonded in a tetrahedral geometry to three O2- and one Cl1- atom. There is two shorter (1.72 Å) and one longer (1.73 Å) Re–O bond length. The Re–Cl bond length is 2.22 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one Re+6.50+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one Re+6.50+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one Re+6.50+ atom. Cl1- is bonded in a single-bond geometry to one Re+6.50+ atom. In the ReOCl4 cluster, Re+6.50+ is bonded in a 5-coordinate geometry to one O2- and four Cl1- atoms. The Re–O bond length is 1.69 Å. All Re–Cl bond lengths are 2.29 Å. O2- is bonded in a single-bond geometry to one Re+6.50+ atom. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Re+6.50+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Re+6.50+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Re+6.50+ atom. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one Re+6.50+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on XeNO3F by Materials Project

XeNO3F crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four XeNO3F clusters. Xe is bonded in a linear geometry to one O and one F atom. The Xe–O bond length is 2.23 Å. The Xe–F bond length is 2.11 Å. N is bonded in a trigonal planar geometry to three O atoms. There are a spread of N–O bond distances ranging from 1.22–1.39 Å. There are three inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one N atom. In the second O site, O is bonded in a single-bond geometry to one N atom. In the third O site, O is bonded in a bent 120 degrees geometry to one Xe and one N atom. F is bonded in a single-bond geometry to one Xe atom.

36 MATERIALS SCIENCE↗
DOE OSTI2025

LeaPP: Learning Pathways to Polymorphs through Machine Learning Analysis of Atomic Trajectories

Understanding the mechanisms underlying crystal nucleation and growth is crucial for many technological applications. Due to the short length and time scales involved, crystal nucleation is often studied using molecular simulations. Most existing approaches to extract the nucleation mechanism from simulations focus on the analysis of static snapshots of the configurations, potentially overlooking subtle local fluctuations and the history of the particles involved in the formation of solid nuclei. Here, in this work, we propose a novel methodology called LeaPP that categorizes nucleation trajectories based on the temporal information of their constituent particles. We leverage the time evolution of the local environment of the crystallizing particles to encapsulate the relationship between the structure and dynamics and distinguish between different evolving particle paths. Identification of the distinct particle paths further enables characterizing the nucleation trajectories into different pathways. Collectively, LeaPP provides a more nuanced understanding of nucleation through an unsupervised approach with lesser dependence on traditional order parameters. Furthermore, the pathways identified by LeaPP are predictive of the resulting polymorph. We demonstrate LeaPP on three different systems─Lennard-Jones-like particles, Ni 3 Al, and water on surfaces. The general methodology underlying LeaPP─considering the time evolution of the building blocks─applies to a wide range of self-assembly problems.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on WCl5 by Materials Project

WCl5 crystallizes in the monoclinic C2/m space group. The structure is zero-dimensional and consists of six WCl5 clusters. In two of the WCl5 clusters, W5+ is bonded to six Cl1- atoms to form edge-sharing WCl6 octahedra. There are four shorter (2.28 Å) and two longer (2.54 Å) W–Cl bond lengths. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one W5+ atom. The Cl–W bond length is 2.28 Å. In the second Cl1- site, Cl1- is bonded in a water-like geometry to two equivalent W5+ atoms. Both Cl–W bond lengths are 2.54 Å. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one W5+ atom. The Cl–W bond length is 2.28 Å. In four of the WCl5 clusters, W5+ is bonded to six Cl1- atoms to form edge-sharing WCl6 octahedra. There are six inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one W5+ atom. In the second Cl1- site, Cl1- is bonded in a water-like geometry to two equivalent W5+ atoms. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one W5+ atom. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one W5+ atom. In the fifth Cl1- site, Cl1- is bonded in a water-like geometry to two equivalent W5+ atoms. In the sixth Cl1- site, Cl1- is bonded in a single-bond geometry to one W5+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ReCl4O by Materials Project

ReOCl4 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of eight ReOCl4 clusters. Re6+ is bonded in a 5-coordinate geometry to one O2- and four Cl1- atoms. The Re–O bond length is 1.69 Å. There are two shorter (2.28 Å) and two longer (2.29 Å) Re–Cl bond lengths. O2- is bonded in a single-bond geometry to one Re6+ atom. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Re6+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Re6+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Re6+ atom. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one Re6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on OsCl4O by Materials Project

OsOCl4 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four OsOCl4 clusters. Os6+ is bonded in a 1-coordinate geometry to one O2- and four Cl1- atoms. The Os–O bond length is 1.68 Å. There are three shorter (2.27 Å) and one longer (2.28 Å) Os–Cl bond lengths. O2- is bonded in a single-bond geometry to one Os6+ atom. There are four inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Os6+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Os6+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Os6+ atom. In the fourth Cl1- site, Cl1- is bonded in a single-bond geometry to one Os6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on AlS2NCl6 by Materials Project

AlCl4NS2Cl2 crystallizes in the monoclinic P2_1/m space group. The structure is zero-dimensional and consists of four AlCl4 clusters and four NS2Cl2 clusters. In each AlCl4 cluster, Al3+ is bonded in a tetrahedral geometry to four Cl1- atoms. There are a spread of Al–Cl bond distances ranging from 2.15–2.18 Å. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one Al3+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one Al3+ atom. In the third Cl1- site, Cl1- is bonded in a single-bond geometry to one Al3+ atom. In each NS2Cl2 cluster, N1- is bonded in a bent 150 degrees geometry to two S2+ atoms. Both N–S bond lengths are 1.54 Å. There are two inequivalent S2+ sites. In the first S2+ site, S2+ is bonded in a water-like geometry to one N1- and one Cl1- atom. The S–Cl bond length is 2.03 Å. In the second S2+ site, S2+ is bonded in a water-like geometry to one N1- and one Cl1- atom. The S–Cl bond length is 2.02 Å. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a single-bond geometry to one S2+ atom. In the second Cl1- site, Cl1- is bonded in a single-bond geometry to one S2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on WSBr4 by Materials Project

WSBr4 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four WSBr4 clusters. W6+ is bonded in a distorted trigonal bipyramidal geometry to one S2- and four Br1- atoms. The W–S bond length is 2.10 Å. There are a spread of W–Br bond distances ranging from 2.46–2.49 Å. S2- is bonded in a single-bond geometry to one W6+ atom. There are four inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a single-bond geometry to one W6+ atom. In the second Br1- site, Br1- is bonded in a single-bond geometry to one W6+ atom. In the third Br1- site, Br1- is bonded in a single-bond geometry to one W6+ atom. In the fourth Br1- site, Br1- is bonded in a single-bond geometry to one W6+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on AsXe2F9 by Materials Project

Xe2F3AsF6 is alpha iridium vanadium-like structured and crystallizes in the triclinic P1 space group. The structure is zero-dimensional and consists of six AsF6 clusters and six Xe2F3 clusters. In each AsF6 cluster, As is bonded in an octahedral geometry to six F atoms. There are a spread of As–F bond distances ranging from 1.77–1.79 Å. There are six inequivalent F sites. In the first F site, F is bonded in a single-bond geometry to one As atom. In the second F site, F is bonded in a single-bond geometry to one As atom. In the third F site, F is bonded in a single-bond geometry to one As atom. In the fourth F site, F is bonded in a single-bond geometry to one As atom. In the fifth F site, F is bonded in a single-bond geometry to one As atom. In the sixth F site, F is bonded in a single-bond geometry to one As atom. The F–As bond length is 1.78 Å. In two of the Xe2F3 clusters, there are two inequivalent Xe sites. In the first Xe site, Xe is bonded in a linear geometry to two F atoms. There are one shorter (2.01 Å) and one longer (2.22 Å) Xe–F bond lengths. In the second Xe site, Xe is bonded in a linear geometry to two F atoms. There are one shorter (2.01 Å) and one longer (2.22 Å) Xe–F bond lengths. There are three inequivalent F sites. In the first F site, F is bonded in a single-bond geometry to one Xe atom. In the second F site, F is bonded in a bent 150 degrees geometry to two Xe atoms. In the third F site, F is bonded in a single-bond geometry to one Xe atom. In four of the Xe2F3 clusters, there are two inequivalent Xe sites. In the first Xe site, Xe is bonded in a linear geometry to two F atoms. There are one shorter (2.01 Å) and one longer (2.22 Å) Xe–F bond lengths. In the second Xe site, Xe is bonded in a linear geometry to two F atoms. There are one shorter (2.01 Å) and one longer (2.23 Å) Xe–F bond lengths. There are three inequivalent F sites. In the first F site, F is bonded in a bent 150 degrees geometry to two Xe atoms. In the second F site, F is bonded in a single-bond geometry to one Xe atom. In the third F site, F is bonded in a single-bond geometry to one Xe atom.

36 MATERIALS SCIENCE↗