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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on H8AuC2S2N4ClO4 by Materials Project

AuC2H8(N2S)2ClO4 crystallizes in the orthorhombic Pcca space group. The structure is zero-dimensional and consists of four AuC2H8(N2S)2 clusters and four ClO4 clusters. In each AuC2H8(N2S)2 cluster, Au1+ is bonded in a linear geometry to two equivalent S2- atoms. Both Au–S bond lengths are 2.32 Å. C4+ is bonded in a distorted trigonal planar geometry to two N1- and one S2- atom. There is one shorter (1.33 Å) and one longer (1.34 Å) C–N bond length. The C–S bond length is 1.73 Å. There are two inequivalent N1- sites. In the first N1- site, N1- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. Both N–H bond lengths are 1.02 Å. In the second N1- site, N1- is bonded in a trigonal planar geometry to one C4+ and two H1+ atoms. Both N–H bond lengths are 1.02 Å. There are four inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N1- atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N1- atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N1- atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one N1- atom. S2- is bonded in a water-like geometry to one Au1+ and one C4+ atom. In each ClO4 cluster, there are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one Cl1- atom. The O–Cl bond length is 1.47 Å. In the second O2- site, O2- is bonded in a single-bond geometry to one Cl1- atom. The O–Cl bond length is 1.45 Å. Cl1- is bonded in a tetrahedral geometry to four O2- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on AgH10S8N8ClO6 by Materials Project

(AgH8(NS)8)2(H2O)2O2(ClO4)2 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of two hydrogen peroxide molecules, four water molecules, four AgH8(NS)8 clusters, and four ClO4 clusters. In each AgH8(NS)8 cluster, Ag3+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of Ag–S bond distances ranging from 2.76–3.28 Å. There are eight inequivalent N2+ sites. In the first N2+ site, N2+ is bonded in a distorted trigonal planar geometry to one H1+ and two S2- atoms. The N–H bond length is 1.02 Å. There is one shorter (1.68 Å) and one longer (1.69 Å) N–S bond length. In the second N2+ site, N2+ is bonded in a distorted trigonal planar geometry to one H1+ and two S2- atoms. The N–H bond length is 1.02 Å. There is one shorter (1.68 Å) and one longer (1.69 Å) N–S bond length. In the third N2+ site, N2+ is bonded in a trigonal planar geometry to one H1+ and two S2- atoms. The N–H bond length is 1.03 Å. There is one shorter (1.68 Å) and one longer (1.69 Å) N–S bond length. In the fourth N2+ site, N2+ is bonded in a distorted trigonal planar geometry to one H1+ and two S2- atoms. The N–H bond length is 1.02 Å. There is one shorter (1.67 Å) and one longer (1.68 Å) N–S bond length. In the fifth N2+ site, N2+ is bonded in a water-like geometry to two S2- atoms. There is one shorter (1.62 Å) and one longer (1.69 Å) N–S bond length. In the sixth N2+ site, N2+ is bonded in a distorted trigonal planar geometry to one H1+ and two S2- atoms. The N–H bond length is 1.02 Å. There is one shorter (1.67 Å) and one longer (1.70 Å) N–S bond length. In the seventh N2+ site, N2+ is bonded in a distorted trigonal planar geometry to one H1+ and two S2- atoms. The N–H bond length is 1.04 Å. There is one shorter (1.68 Å) and one longer (1.69 Å) N–S bond length. In the eighth N2+ site, N2+ is bonded in a distorted trigonal planar geometry to one H1+ and two S2- atoms. The N–H bond length is 1.03 Å. There is one shorter (1.68 Å) and one longer (1.72 Å) N–S bond length. There are eight inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N2+ atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N2+ atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N2+ atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one N2+ atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one S2- atom. The H–S bond length is 1.37 Å. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one N2+ atom. In the seventh H1+ site, H1+ is bonded in a single-bond geometry to one N2+ atom. In the eighth H1+ site, H1+ is bonded in a single-bond geometry to one N2+ atom. There are eight inequivalent S2- sites. In the first S2- site, S2- is bonded in a water-like geometry to one Ag3+ and two N2+ atoms. In the second S2- site, S2- is bonded in a water-like geometry to one Ag3+ and two N2+ atoms. In the third S2- site, S2- is bonded in a distorted water-like geometry to one Ag3+ and two N2+ atoms. In the fourth S2- site, S2- is bonded in a distorted water-like geometry to one Ag3+ and two N2+ atoms. In the fifth S2- site, S2- is bonded in a 3-coordinate geometry to one Ag3+, two N2+, and one H1+ atom. In the sixth S2- site, S2- is bonded in a distorted water-like geometry to one Ag3+ and two N2+ atoms. In the seventh S2- site, S2- is bonded in a distorted water-like geometry to one Ag3+ and two N2+ atoms. In the eighth S2- site, S2- is bonded in a distorted water-like geometry to one Ag3+ and two N2+ atoms. In each ClO4 cluster, there are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one Cl1- atom. The O–Cl bond length is 1.45 Å. In the second O2- site, O2- is bonded in a single-bond geometry to one Cl1- atom. The O–Cl bond length is 1.46 Å. In the third O2- site, O2- is bonded in a single-bond geometry to one Cl1- atom. The O–Cl bond length is 1.47 Å. In the fourth O2- site, O2- is bonded in a single-bond geometry to one Cl1- atom. The O–Cl bond length is 1.48 Å. Cl1- is bonded in a tetrahedral geometry to four O2- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Te(AsO2)2 by Materials Project

(AsO2)2(AsO3)2Te(AsO2)3As5Te5O8 crystallizes in the triclinic P1 space group. The structure is two-dimensional and consists of two AsO2 clusters; one AsO3 cluster; one Te(AsO2)3 ribbon oriented in the (0, 1, 0) direction; and one As5Te5O8 sheet oriented in the (0, 0, 1) direction. In each AsO2 cluster, As5+ is bonded in a 5-coordinate geometry to two O2- atoms. There is one shorter (1.88 Å) and one longer (1.91 Å) As–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to one As5+ and one O2- atom. The O–O bond length is 1.53 Å. In the second O2- site, O2- is bonded in a 1-coordinate geometry to one As5+ and one O2- atom. In the AsO3 cluster, there are two inequivalent As5+ sites. In the first As5+ site, As5+ is bonded in a distorted T-shaped geometry to three O2- atoms. There is two shorter (1.86 Å) and one longer (1.89 Å) As–O bond length. In the second As5+ site, As5+ is bonded in a distorted T-shaped geometry to three O2- atoms. There are a spread of As–O bond distances ranging from 1.82–1.86 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted water-like geometry to one As5+ and one O2- atom. The O–O bond length is 1.50 Å. In the second O2- site, O2- is bonded in a distorted water-like geometry to one As5+ and one O2- atom. In the third O2- site, O2- is bonded in a 1-coordinate geometry to one As5+ and one O2- atom. The O–O bond length is 1.54 Å. In the fourth O2- site, O2- is bonded in a distorted single-bond geometry to one As5+ and one O2- atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to one As5+ and one O2- atom. The O–O bond length is 1.53 Å. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to one As5+ and one O2- atom. In the Te(AsO2)3 ribbon, there are three inequivalent As5+ sites. In the first As5+ site, As5+ is bonded in a water-like geometry to two O2- atoms. There is one shorter (1.81 Å) and one longer (1.88 Å) As–O bond length. In the second As5+ site, As5+ is bonded in a water-like geometry to two O2- atoms. There is one shorter (1.66 Å) and one longer (1.83 Å) As–O bond length. In the third As5+ site, As5+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of As–O bond distances ranging from 1.78–1.87 Å. Te2- is bonded in a distorted linear geometry to two O2- atoms. There are one shorter (2.10 Å) and one longer (2.20 Å) Te–O bond lengths. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 120 degrees geometry to two As5+ atoms. In the second O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one As5+ and one Te2- atom. In the third O2- site, O2- is bonded in a distorted bent 120 degrees geometry to two As5+ atoms. In the fourth O2- site, O2- is bonded in a single-bond geometry to one As5+ atom. In the fifth O2- site, O2- is bonded in a distorted water-like geometry to one As5+ and one O2- atom. The O–O bond length is 1.48 Å. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to one Te2- and one O2- atom. In the As5Te5O8 sheet, there are five inequivalent As5+ sites. In the first As5+ site, As5+ is bonded in a single-bond geometry to one O2- atom. The As–O bond length is 1.87 Å. In the second As5+ site, As5+ is bonded in a distorted rectangular see-saw-like geometry to three Te2- and one O2- atom. There are one shorter (2.77 Å) and two longer (2.78 Å) As–Te bond lengths. The As–O bond length is 2.61 Å. In the third As5+ site, As5+ is bonded in a 1-coordinate geometry to three Te2- and three O2- atoms. There are a spread of As–Te bond distances ranging from 2.83–2.94 Å. There are a spread of As–O bond distances ranging from 2.20–2.59 Å. In the fourth As5+ site, As5+ is bonded in a 1-coordinate geometry to one O2- atom. The As–O bond length is 2.50 Å. In the fifth As5+ site, As5+ is bonded in a single-bond geometry to one O2- atom. The As–O bond length is 1.91 Å. There are five inequivalent Te2- sites. In the first Te2- site, Te2- is bonded in a 2-coordinate geometry to one As5+ and two equivalent O2- atoms. There are one shorter (2.42 Å) and one longer (2.62 Å) Te–O bond lengths. In the second Te2- site, Te2- is bonded in a 2-coordinate geometry to three As5+ and three O2- atoms. There are a spread of Te–O bond distances ranging from 2.65–3.37 Å. In the third Te2- site, Te2- is bonded in a 3-coordinate geometry to two equivalent As5+ and four O2- atoms. There are a spread of Te–O bond distances ranging from 2.59–3.29 Å. In the fourth Te2- site, Te2- is bonded in a 1-coordinate geometry to three O2- atoms. There are a spread of Te–O bond distances ranging from 2.45–3.14 Å. In the fifth Te2- site, Te2- is bonded in a 1-coordinate geometry to one O2- atom. The Te–O bond length is 2.78 Å. There are eight inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one As5+ and one O2- atom. The O–O bond length is 1.45 Å. In the second O2- site, O2- is bonded in a 4-coordinate geometry to three Te2- and one O2- atom. In the third O2- site, O2- is bonded in a 2-coordinate geometry to three As5+, one Te2-, and one O2- atom. The O–O bond length is 1.36 Å. In the fourth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to two As5+ and one O2- atom. The O–O bond length is 1.38 Å. In the fifth O2- site, O2- is bonded to three Te2- and one O2- atom to form distorted corner-sharing OTe3O trigonal pyramids. In the sixth O2- site, O2- is bonded to three Te2- and one O2- atom to form distorted corner-sharing OTe3O tetrahedra. In the seventh O2- site, O2- is bonded in a distorted single-bond geometry to one As5+ and one O2- atom. The O–O bond length is 1.44 Å. In the eighth O2- site, O2- is bonded to three Te2- and one O2- atom to form distorted corner-sharing OTe3O tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2022

A nearsighted force-training approach to systematically generate training data for the machine learning of large atomic structures

A challenge of atomistic machine-learning (ML) methods is ensuring that the training data are suitable for the system being simulated, which is particularly challenging for systems with large numbers of atoms. Most atomistic ML approaches rely on the nearsightedness principle (“all chemistry is local”), using information about the position of an atom’s neighbors to predict a per-atom energy. Here, in this work, we develop a framework that exploits the nearsighted nature of ML models to systematically produce an appropriate training set for large structures. We use a per-atom uncertainty estimate to identify the most uncertain atoms and extract chunks centered around these atoms. It is crucial that these small chunks are both large enough to satisfy the ML’s nearsighted principle (that is, filling the cutoff radius) and are large enough to be converged with respect to the electronic structure calculation. We present data indicating when the electronic structure calculations are converged with respect to the structure size, which fundamentally limits the accuracy of any nearsighted ML calculator. These new atomic chunks are calculated in electronic structures, and crucially, only a single force—that of the central atom—is added to the growing training set, preventing the noisy and irrelevant information from the piece’s boundary from interfering with ML training. The resulting ML potentials are robust, despite requiring single-point calculations on only small reference structures and never seeing large training structures. We demonstrated our approach via structure optimization of a 260-atom structure and extended the approach to clusters with up to 1415 atoms.

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

Materials Data on SbH7F11 by Materials Project

(SbH7F10)2SbH3F8Sb2H12F21(HF)6 crystallizes in the triclinic P1 space group. The structure is one-dimensional and consists of six hydrofluoric acid molecules; one SbH3F8 cluster; one SbH7F10 cluster; and one Sb2H12F21 ribbon oriented in the (1, 0, 0) direction. In the SbH3F8 cluster, Sb is bonded in a trigonal bipyramidal geometry to five F atoms. There are a spread of Sb–F bond distances ranging from 1.87–1.93 Å. There are three inequivalent H sites. In the first H site, H is bonded in a linear geometry to two F atoms. There is one shorter (0.98 Å) and one longer (1.49 Å) H–F bond length. In the second H site, H is bonded in a single-bond geometry to two F atoms. There is one shorter (0.97 Å) and one longer (1.65 Å) H–F bond length. In the third H site, H is bonded in a linear geometry to two F atoms. There is one shorter (0.98 Å) and one longer (1.50 Å) H–F bond length. There are eight inequivalent F sites. In the first F site, F is bonded in a single-bond geometry to one Sb atom. In the second F site, F is bonded in a single-bond geometry to one H 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 distorted bent 120 degrees geometry to two H atoms. 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 distorted bent 150 degrees geometry to one Sb and one H atom. In the eighth F site, F is bonded in a bent 120 degrees geometry to two H atoms. In the SbH7F10 cluster, there are two inequivalent Sb sites. In the first Sb site, Sb is bonded in a distorted rectangular see-saw-like geometry to four F atoms. There are a spread of Sb–F bond distances ranging from 1.98–2.44 Å. In the second Sb site, Sb is bonded in a 3-coordinate geometry to three F atoms. There are a spread of Sb–F bond distances ranging from 1.92–2.02 Å. There are fourteen inequivalent H sites. In the first H site, H is bonded in a linear geometry to two F atoms. There is one shorter (1.01 Å) and one longer (1.40 Å) H–F bond length. In the second H site, H is bonded in a linear geometry to two F atoms. There is one shorter (0.98 Å) and one longer (1.51 Å) H–F bond length. In the third H site, H is bonded in a linear geometry to two F atoms. There is one shorter (0.98 Å) and one longer (1.47 Å) H–F bond length. In the fourth H site, H is bonded in a linear geometry to two F atoms. There is one shorter (1.00 Å) and one longer (1.39 Å) H–F bond length. In the fifth H site, H is bonded in a distorted linear geometry to two F atoms. There is one shorter (0.98 Å) and one longer (1.56 Å) H–F bond length. In the sixth H site, H is bonded in a distorted linear geometry to two F atoms. There is one shorter (0.98 Å) and one longer (1.49 Å) H–F bond length. In the seventh H site, H is bonded in a linear geometry to two F atoms. There is one shorter (1.02 Å) and one longer (1.36 Å) H–F bond length. In the eighth H site, H is bonded in a distorted linear geometry to two F atoms. There is one shorter (0.98 Å) and one longer (1.53 Å) H–F bond length. In the ninth H site, H is bonded in a linear geometry to two F atoms. There is one shorter (1.03 Å) and one longer (1.34 Å) H–F bond length. In the tenth H site, H is bonded in a linear geometry to two F atoms. There is one shorter (1.00 Å) and one longer (1.40 Å) H–F bond length. In the eleventh H site, H is bonded in a distorted linear geometry to two F atoms. There is one shorter (0.99 Å) and one longer (1.49 Å) H–F bond length. In the twelfth H site, H is bonded in a distorted linear geometry to two F atoms. There is one shorter (0.98 Å) and one longer (1.55 Å) H–F bond length. In the thirteenth H site, H is bonded in a linear geometry to two F atoms. There is one shorter (0.99 Å) and one longer (1.47 Å) H–F bond length. In the fourteenth H site, H is bonded in a linear geometry to two F atoms. There is one shorter (1.01 Å) and one longer (1.37 Å) H–F bond length. There are twenty inequivalent F sites. In the first F site, F is bonded in a single-bond geometry to one Sb and one H atom. In the second F site, F is bonded in a single-bond geometry to one H atom. In the third F site, F is bonded in a bent 120 degrees geometry to one Sb and one H atom. In the fourth F site, F is bonded in a bent 150 degrees geometry to one Sb and one H atom. In the fifth F site, F is bonded in a bent 120 degrees geometry to two H atoms. In the sixth F site, F is bonded in a single-bond geometry to one H atom. In the seventh F site, F is bonded in a distorted bent 120 degrees geometry to one Sb and one H atom. In the eighth F site, F is bonded in a water-like geometry to two H atoms. In the ninth F site, F is bonded in a bent 120 degrees geometry to two H atoms. In the tenth F site, F is bonded in a distorted single-bond geometry to one Sb atom. In the eleventh F site, F is bonded in a distorted water-like geometry to two H atoms. In the twelfth F site, F is bonded in a bent 120 degrees geometry to two H atoms. In the thirteenth F site, F is bonded in a bent 150 degrees geometry to one Sb and one H atom. In the fourteenth F site, F is bonded in a single-bond geometry to one Sb atom. In the fifteenth F site, F is bonded in a distorted bent 120 degrees geometry to two H atoms. In the sixteenth F site, F is bonded in a bent 120 degrees geometry to two H atoms. In the seventeenth F site, F is bonded in a bent 120 degrees geometry to two H atoms. In the eighteenth F site, F is bonded in a single-bond geometry to one H atom. In the nineteenth F site, F is bonded in a distorted L-shaped geometry to two H atoms. In the twentieth F site, F is bonded in a distorted bent 120 degrees geometry to two H atoms. In the Sb2H12F21 ribbon, there are two inequivalent Sb sites. In the first Sb site, Sb is bonded in an octahedral geometry to six F atoms. There are a spread of Sb–F bond distances ranging from 1.95–2.42 Å. In the second Sb site, Sb is bonded in a 7-coordinate geometry to seven F atoms. There are a spread of Sb–F bond distances ranging from 1.89–2.46 Å. There are twelve inequivalent H sites. In the first H site, H is bonded in a linear geometry to two F atoms. There is one shorter (0.98 Å) and one longer (1.47 Å) H–F bond length. In the second H site, H is bonded in a single-bond geometry to one F atom. The H–F bond length is 0.98 Å. In the third H site, H is bonded in a linear geometry to two F atoms. There is one shorter (0.99 Å) and one longer (1.45 Å) H–F bond length. In the fourth H site, H is bonded in a linear geometry to two F atoms. There is one shorter (0.99 Å) and one longer (1.46 Å) H–F bond length. In the fifth H site, H is bonded in a distorted single-bond geometry to two F atoms. There is one shorter (0.97 Å) and one longer (1.59 Å) H–F bond length. In the sixth H site, H is bonded in a linear geometry to two F atoms. There is one shorter (1.10 Å) and one longer (1.20 Å) H–F bond length. In the seventh H site, H is bonded in a linear geometry to two F atoms. There is one shorter (1.03 Å) and one longer (1.33 Å) H–F bond length. In the eighth H site, H is bonded in a linear geometry to two F atoms. There is one shorter (0.99 Å) and one longer (1.50 Å) H–F bond length. In the ninth H site, H is bonded in a linear geometry to two F atoms. There is one shorter (1.01 Å) and one longer (1.42 Å) H–F bond length. In the tenth H site, H is bonded in a distorted linear geometry to two F atoms. There is one shorter (0.98 Å) and one longer (1.49 Å) H–F bond length. In the eleventh H site, H is bonded in a linear geometry to two F atoms. There is one shorter (1.02 Å) and one longer (1.36 Å) H–F bond length. In the twelfth H site, H is bonded in a linear geometry to two F atoms. There is one shorter (1.11 Å) and one longer (1.20 Å) H–F bond length. There are twenty-one inequivalent F sites. In the first F site, F is bonded in a single-bond geometry to one Sb atom. In the second F site, F is bonded in a single-bond geometry to one H atom. In the third F site, F is bonded in a bent 120 degrees geometry to two H atoms. 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 distorted bent 120 degrees geometry to two H atoms. In the sixth F site, F is bonded in a single-bond geometry to one Sb and one H atom. In the seventh F site, F is bonded in a distorted bent 120 degrees geometry to one Sb and one H atom. In the eighth F site, F is bonded in a bent 120 degrees geometry to one Sb and one H atom. In the ninth F site, F is bonded in a water-like geometry to two H atoms. In the tenth F site, F is bonded in a distorted bent 120 degrees geometry to one Sb and one H atom. In the eleventh F site, F is bonded in a single-bond geometry to one Sb and one H atom. In the twelfth F site, F is bonded in a bent 120 degrees geometry to one Sb and one H atom. In the thirteenth F site, F is bonded in a bent 120 degrees geometry to two H atoms. In the fourteenth F site, F is bonded in a single-bond geometry to one Sb atom. In the fifteenth F site, F is bonded in a bent 120 degrees geometry to two H atoms. In the sixteenth F site, F is bonded in a distorted single-bond geometry to one Sb and one H atom. In the seventeenth F site, F is bonded in a bent 120 degrees geometry to two H atoms. In the eighteenth F site, F is bonded in a single-bond geometry to one Sb atom. In the nineteenth F site, F is bonded in a distorted bent 120 degrees geometry to one Sb and one H atom. In the twentieth F site, F is bonded in a water-like geometry to two H atoms. In the twenty-first F site, F is bonded in a single-bond geometry to one Sb atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CuBi2Se2O by Materials Project

CuSe2Bi2O is alpha Niobium phosphide-like structured and crystallizes in the tetragonal P4/mmm space group. The structure is zero-dimensional and consists of one Bi2O cluster and one CuSe2 cluster. In the Bi2O cluster, Bi+2.50+ is bonded in a single-bond geometry to one O2- atom. The Bi–O bond length is 2.08 Å. O2- is bonded in a linear geometry to two equivalent Bi+2.50+ atoms. In the CuSe2 cluster, Cu1+ is bonded in a linear geometry to two equivalent Se2- atoms. Both Cu–Se bond lengths are 2.27 Å. Se2- is bonded in a distorted single-bond geometry to one Cu1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CuBi2Te2O by Materials Project

CuTe2Bi2O is alpha Niobium phosphide-like structured and crystallizes in the tetragonal P4/mmm space group. The structure is zero-dimensional and consists of one Bi2O cluster and one CuTe2 cluster. In the Bi2O cluster, Bi+2.50+ is bonded in a single-bond geometry to one O2- atom. The Bi–O bond length is 2.09 Å. O2- is bonded in a linear geometry to two equivalent Bi+2.50+ atoms. In the CuTe2 cluster, Cu1+ is bonded in a linear geometry to two equivalent Te2- atoms. Both Cu–Te bond lengths are 2.47 Å. Te2- is bonded in a distorted single-bond geometry to one Cu1+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2025

Diffusion of alloying and fission atoms in α-U investigated by first-principles calculation

Stability and diffusion of small defect clusters containing alloying or fission atoms (“F” is used to represent both atoms) in an α-uranium (U) crystal are investigated using first-principles calculations. Here, results indicate that different stable defect structures are observed for an interstitial defect and a cluster (F n V m ) containing different alloying or fission atoms and vacancies. An interstitial defect is found to be most stable either at the center of a pyramid pentahedron or in a 〈010〉 mixed dumbbell configuration and the latter one is reported for the first time. Formation energy of a small F n V m cluster depends on the distribution of vacancies. Based on these stable defects, new migration energies and paths have been explored in this work. Anisotropic migration of an interstitial defect by jumping between nearest centers of two pyramid pentahedrons or jumping between two mixed U-Zr dumbbells has been suggested. Furthermore, a new migration-rotation mechanism has been explored for the first time for a FV 2 cluster, resulting in a 3D diffusion. Finally, the effect of substitutional Pu atoms on the migration of a FV 2 cluster suggests that optimizing the Pu concentration may prohibit the diffusion of some alloying or fission atoms, increasing the safe performance of metallic fuels.

3D diffusion↗
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 OSTI2021

Tuning Electronic Properties of 2D Materials Using Metal Adsorbates: Cu at WTe 2 Edges

Two-dimensional materials exhibit properties promising for novel applications. Topologically protected states at their edges can be harnessed for use in quantum devices. We use ab initio simulations to examine properties of edges in 1T'-WTe 2 monolayers, known to exhibit topological order, and their interactions with Cu atoms. Comparison of (010)-oriented edges that have the same composition but different terminations shows that, as the number of Cu atoms increases, their thermodynamically-preferred arrangement depends on the details of the edge structure. Cu atoms aggregate into a cluster at the most stable edge; while the cluster is non-magnetic, it spin-polarizes the W atoms along the edge, which removes the topological protection. At the metastable edge, Cu atoms form a chain incorporated into the WTe 2 lattice; the topological state is preserved in spite of the dramatic edge restructuring. This suggests that exploiting interactions of metal species with metastable edge terminations can provide a path towards non-invasive interfaces.

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

Materials Data on Sb4IrC5ClO5F22 by Materials Project

IrCl(CO)5(Sb2F11)2 crystallizes in the monoclinic P2_1 space group. The structure is zero-dimensional and consists of ten formaldehyde molecules, two IrCl clusters, and four Sb2F11 clusters. In each IrCl cluster, Ir5+ is bonded in a single-bond geometry to one Cl1- atom. The Ir–Cl bond length is 2.37 Å. Cl1- is bonded in a distorted single-bond geometry to one Ir5+ atom. In each Sb2F11 cluster, there are two inequivalent Sb2+ sites. In the first Sb2+ site, Sb2+ is bonded to six F1- atoms to form corner-sharing SbF6 octahedra. The corner-sharing octahedral tilt angles are 28°. There are a spread of Sb–F bond distances ranging from 1.89–2.06 Å. In the second Sb2+ site, Sb2+ is bonded to six F1- atoms to form corner-sharing SbF6 octahedra. The corner-sharing octahedral tilt angles are 28°. There are a spread of Sb–F bond distances ranging from 1.89–2.09 Å. There are eleven inequivalent F1- sites. In the first F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the second F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the third F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the fourth F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the fifth F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the sixth F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the seventh F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the eighth F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the ninth F1- site, F1- is bonded in a bent 150 degrees geometry to two Sb2+ atoms. In the tenth F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom. In the eleventh F1- site, F1- is bonded in a single-bond geometry to one Sb2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on RuSN4(ClO)2 by Materials Project

RuN2ClN2ClSO2 crystallizes in the orthorhombic Pnma space group. The structure is zero-dimensional and consists of four sulfur dioxide molecules, four N2Cl clusters, and four RuN2Cl clusters. In each N2Cl cluster, N1+ is bonded in a single-bond geometry to one Cl1- atom. The N–Cl bond length is 1.53 Å. Cl1- is bonded in a 2-coordinate geometry to two equivalent N1+ atoms. In each RuN2Cl cluster, Ru4+ is bonded in a trigonal non-coplanar geometry to two equivalent N1+ and one Cl1- atom. Both Ru–N bond lengths are 1.72 Å. The Ru–Cl bond length is 2.26 Å. N1+ is bonded in a single-bond geometry to one Ru4+ atom. Cl1- is bonded in a single-bond geometry to one Ru4+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CoHRu3(CO)13 by Materials Project

RuRu2HCo(CO)4(CO)9 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of thirty-six formaldehyde molecules, four ruthenium molecules, four Co(CO)4 clusters, and four Ru2H clusters. In each Co(CO)4 cluster, Co2+ is bonded in a distorted trigonal pyramidal geometry to four C+0.92+ atoms. There are a spread of Co–C bond distances ranging from 1.75–1.89 Å. There are four inequivalent C+0.92+ sites. In the first C+0.92+ site, C+0.92+ is bonded in a distorted bent 150 degrees geometry to one Co2+ and one O2- atom. The C–O bond length is 1.18 Å. In the second C+0.92+ site, C+0.92+ is bonded in a linear geometry to one Co2+ and one O2- atom. The C–O bond length is 1.16 Å. In the third C+0.92+ site, C+0.92+ is bonded in a distorted single-bond geometry to one Co2+ and one O2- atom. The C–O bond length is 1.18 Å. In the fourth C+0.92+ site, C+0.92+ is bonded in a distorted single-bond geometry to one Co2+ and one O2- atom. The C–O bond length is 1.18 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one C+0.92+ atom. In the second O2- site, O2- is bonded in a single-bond geometry to one C+0.92+ atom. In the third O2- site, O2- is bonded in a single-bond geometry to one C+0.92+ atom. In the fourth O2- site, O2- is bonded in a single-bond geometry to one C+0.92+ atom. In each Ru2H cluster, Ru+3.67+ is bonded in a 1-coordinate geometry to one H1+ atom. The Ru–H bond length is 1.80 Å. H1+ is bonded in a bent 120 degrees geometry to two equivalent Ru+3.67+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on PdRhN5Cl5O by Materials Project

PdCl2PdCl4(RhNCl)2(N2O)2(N2Cl)2 crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of two ac1l8io8 molecules; four hydroxylamine, o-amino- molecules; two palladium(ii) chloride molecules; four N2Cl clusters; and four RhNCl clusters. In each N2Cl cluster, N+0.20+ is bonded in a single-bond geometry to one Cl1- atom. The N–Cl bond length is 1.53 Å. Cl1- is bonded in a distorted bent 120 degrees geometry to two equivalent N+0.20+ atoms. In each RhNCl cluster, Rh4+ is bonded in a 1-coordinate geometry to one N+0.20+ atom. The Rh–N bond length is 1.82 Å. N+0.20+ is bonded in a distorted bent 120 degrees geometry to one Rh4+ and one Cl1- atom. The N–Cl bond length is 1.66 Å. Cl1- is bonded in a single-bond geometry to one N+0.20+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Co2CN9(Cl2O3)2 by Materials Project

(CoN2Cl)4(N2)3(CO2)2(NO2Cl)4 crystallizes in the orthorhombic Pnma space group. The structure is zero-dimensional and consists of four carbon dioxide molecules, four triazane molecules, eight CoN2Cl clusters, and four NO2Cl clusters. In each CoN2Cl cluster, Co+3.50+ is bonded in a 1-coordinate geometry to two N+0.56+ atoms. There is one shorter (1.55 Å) and one longer (1.71 Å) Co–N bond length. There are two inequivalent N+0.56+ sites. In the first N+0.56+ site, N+0.56+ is bonded in a single-bond geometry to one Co+3.50+ atom. In the second N+0.56+ site, N+0.56+ is bonded in a distorted bent 120 degrees geometry to one Co+3.50+ and one Cl1- atom. The N–Cl bond length is 1.61 Å. Cl1- is bonded in a single-bond geometry to one N+0.56+ atom. In each NO2Cl cluster, N+0.56+ is bonded in a 1-coordinate geometry to two Cl1- atoms. There are one shorter (1.70 Å) and one longer (2.63 Å) N–Cl bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted single-bond geometry to one O2- and one Cl1- atom. The O–O bond length is 1.23 Å. The O–Cl bond length is 3.41 Å. In the second O2- site, O2- is bonded in a single-bond geometry to one O2- atom. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a distorted square co-planar geometry to two equivalent N+0.56+ and two equivalent O2- atoms. In the second Cl1- site, Cl1- is bonded in a bent 120 degrees geometry to two equivalent N+0.56+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on InRe4C14I3O14 by Materials Project

InRe2I(ReI)2(CO)14 crystallizes in the monoclinic C2/c space group. The structure is zero-dimensional and consists of fifty-six formaldehyde molecules, four indium molecules, four Re2I clusters, and four ReI clusters. In each Re2I cluster, Re3+ is bonded in a distorted single-bond geometry to one I1- atom. The Re–I bond length is 2.81 Å. I1- is bonded in a 2-coordinate geometry to two equivalent Re3+ atoms. In each ReI cluster, Re3+ is bonded in a 2-coordinate geometry to two equivalent I1- atoms. There are one shorter (2.83 Å) and one longer (2.85 Å) Re–I bond lengths. I1- is bonded in a 4-coordinate geometry to two equivalent Re3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on H6AuN2ClO4 by Materials Project

AuN2H6ClO4 crystallizes in the triclinic P-1 space group. The structure is zero-dimensional and consists of four AuN2H6 clusters and four ClO4 clusters. In two of the AuN2H6 clusters, Au1+ is bonded in a linear geometry to two equivalent N1+ atoms. Both Au–N bond lengths are 2.08 Å. N1+ is bonded in a trigonal non-coplanar geometry to one Au1+ and three H1+ atoms. All N–H bond lengths are 1.03 Å. There are three inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N1+ atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N1+ atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N1+ atom. In two of the AuN2H6 clusters, Au1+ is bonded in a linear geometry to two N1+ atoms. Both Au–N bond lengths are 2.08 Å. There are two inequivalent N1+ sites. In the first N1+ site, N1+ is bonded in a trigonal non-coplanar geometry to one Au1+ and three H1+ atoms. There is one shorter (1.02 Å) and two longer (1.03 Å) N–H bond length. In the second N1+ site, N1+ is bonded in a trigonal non-coplanar geometry to one Au1+ and three H1+ atoms. There is two shorter (1.02 Å) and one longer (1.03 Å) N–H bond length. There are six inequivalent H1+ sites. In the first H1+ site, H1+ is bonded in a single-bond geometry to one N1+ atom. In the second H1+ site, H1+ is bonded in a single-bond geometry to one N1+ atom. In the third H1+ site, H1+ is bonded in a single-bond geometry to one N1+ atom. In the fourth H1+ site, H1+ is bonded in a single-bond geometry to one N1+ atom. In the fifth H1+ site, H1+ is bonded in a single-bond geometry to one N1+ atom. In the sixth H1+ site, H1+ is bonded in a single-bond geometry to one N1+ atom. In each ClO4 cluster, there are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one Cl1- atom. The O–Cl bond length is 1.46 Å. In the second O2- site, O2- is bonded in a single-bond geometry to one Cl1- atom. The O–Cl bond length is 1.46 Å. In the third O2- site, O2- is bonded in a single-bond geometry to one Cl1- atom. The O–Cl bond length is 1.46 Å. In the fourth O2- site, O2- is bonded in a single-bond geometry to one Cl1- atom. The O–Cl bond length is 1.47 Å. Cl1- is bonded in a tetrahedral geometry to four O2- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SbClF10 by Materials Project

SbF6ClF4 crystallizes in the orthorhombic Pbcm space group. The structure is zero-dimensional and consists of four ClF4 clusters and four SbF6 clusters. In each ClF4 cluster, Cl is bonded in a rectangular see-saw-like geometry to four F atoms. There are a spread of Cl–F bond distances ranging from 1.59–1.67 Å. There are two inequivalent F sites. In the first F site, F is bonded in a single-bond geometry to one Cl atom. In the second F site, F is bonded in a single-bond geometry to one Cl atom. In each SbF6 cluster, Sb is bonded in an octahedral geometry to six F atoms. There are a spread of Sb–F bond distances ranging from 1.90–1.97 Å. There are five inequivalent F sites. In the first F site, F is bonded in a single-bond geometry to one Sb atom. 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.

36 MATERIALS SCIENCE↗