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DOE OSTI2020

Materials Data on CsW3Br7 by Materials Project

CsW3Br7 crystallizes in the trigonal P31c space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 6-coordinate geometry to six Br1- atoms. All Cs–Br bond lengths are 3.80 Å. In the second Cs1+ site, Cs1+ is bonded to twelve Br1- atoms to form distorted CsBr12 cuboctahedra that share corners with six WBr5 square pyramids and faces with six WBr5 square pyramids. There are a spread of Cs–Br bond distances ranging from 3.92–4.28 Å. There are two inequivalent W2+ sites. In the first W2+ site, W2+ is bonded to five Br1- atoms to form WBr5 square pyramids that share a cornercorner with one CsBr12 cuboctahedra, edges with four WBr5 square pyramids, and a faceface with one CsBr12 cuboctahedra. There are a spread of W–Br bond distances ranging from 2.63–2.69 Å. In the second W2+ site, W2+ is bonded to five Br1- atoms to form WBr5 square pyramids that share a cornercorner with one CsBr12 cuboctahedra, edges with four WBr5 square pyramids, and a faceface with one CsBr12 cuboctahedra. There are a spread of W–Br bond distances ranging from 2.62–2.69 Å. There are six inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 1-coordinate geometry to two Cs1+ and one W2+ atom. In the second Br1- site, Br1- is bonded in a distorted bent 120 degrees geometry to two Cs1+ and one W2+ atom. In the third Br1- site, Br1- is bonded in a 6-coordinate geometry to three equivalent W2+ atoms. In the fourth Br1- site, Br1- is bonded in a 6-coordinate geometry to three equivalent W2+ atoms. In the fifth Br1- site, Br1- is bonded in a 4-coordinate geometry to one Cs1+ and three W2+ atoms. In the sixth Br1- site, Br1- is bonded in a 4-coordinate geometry to one Cs1+ and three W2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CsHgBr3 by Materials Project

CsHgBr3 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a 8-coordinate geometry to eight Br1- atoms. There are a spread of Cs–Br bond distances ranging from 3.78–4.24 Å. In the second Cs1+ site, Cs1+ is bonded in a 8-coordinate geometry to eight Br1- atoms. There are a spread of Cs–Br bond distances ranging from 3.92–4.15 Å. There are two inequivalent Hg2+ sites. In the first Hg2+ site, Hg2+ is bonded in a 6-coordinate geometry to six Br1- atoms. There are a spread of Hg–Br bond distances ranging from 2.54–3.56 Å. In the second Hg2+ site, Hg2+ is bonded in a 4-coordinate geometry to four Br1- atoms. There are a spread of Hg–Br bond distances ranging from 2.54–2.88 Å. There are five inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a distorted single-bond geometry to three Cs1+ and one Hg2+ atom. In the second Br1- site, Br1- is bonded to four Cs1+ and two equivalent Hg2+ atoms to form distorted corner-sharing BrCs4Hg2 octahedra. The corner-sharing octahedral tilt angles are 0°. In the third Br1- site, Br1- is bonded in a 5-coordinate geometry to three Cs1+ and two Hg2+ atoms. In the fourth Br1- site, Br1- is bonded in a 1-coordinate geometry to two Cs1+ and one Hg2+ atom. In the fifth Br1- site, Br1- is bonded in a distorted single-bond geometry to two equivalent Cs1+ and two Hg2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba10IBr4N5 by Materials Project

Ba10N5IBr4 is Caswellsilverite-derived structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. there are five inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded to three equivalent N3- and three equivalent Br1- atoms to form a mixture of distorted edge and corner-sharing BaBr3N3 octahedra. The corner-sharing octahedral tilt angles are 0°. All Ba–N bond lengths are 2.85 Å. All Ba–Br bond lengths are 3.50 Å. In the second Ba2+ site, Ba2+ is bonded to three equivalent N3- and three equivalent I1- atoms to form a mixture of distorted edge and corner-sharing BaI3N3 octahedra. The corner-sharing octahedral tilt angles are 0°. All Ba–N bond lengths are 2.83 Å. All Ba–I bond lengths are 3.62 Å. In the third Ba2+ site, Ba2+ is bonded to three equivalent N3- and three equivalent Br1- atoms to form a mixture of distorted edge and corner-sharing BaBr3N3 octahedra. The corner-sharing octahedral tilt angles are 0°. All Ba–N bond lengths are 2.84 Å. All Ba–Br bond lengths are 3.49 Å. In the fourth Ba2+ site, Ba2+ is bonded to three equivalent N3- and three equivalent Br1- atoms to form a mixture of distorted edge and corner-sharing BaBr3N3 octahedra. The corner-sharing octahedral tilt angles are 0°. All Ba–N bond lengths are 2.85 Å. All Ba–Br bond lengths are 3.52 Å. In the fifth Ba2+ site, Ba2+ is bonded to three equivalent N3- and three equivalent Br1- atoms to form a mixture of distorted edge and corner-sharing BaBr3N3 octahedra. The corner-sharing octahedral tilt angles are 0°. All Ba–N bond lengths are 2.85 Å. All Ba–Br bond lengths are 3.52 Å. There are three inequivalent N3- sites. In the first N3- site, N3- is bonded to six Ba2+ atoms to form edge-sharing NBa6 octahedra. In the second N3- site, N3- is bonded to six Ba2+ atoms to form edge-sharing NBa6 octahedra. In the third N3- site, N3- is bonded to six equivalent Ba2+ atoms to form edge-sharing NBa6 octahedra. I1- is bonded in a 6-coordinate geometry to six equivalent Ba2+ atoms. There are two inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 6-coordinate geometry to six Ba2+ atoms. In the second Br1- site, Br1- is bonded in a 6-coordinate geometry to six Ba2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on W2Br5 by Materials Project

W2Br5 crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of one W2Br5 sheet oriented in the (1, 0, 0) direction. there are four inequivalent W+2.50+ sites. In the first W+2.50+ site, W+2.50+ is bonded to five Br1- atoms to form a mixture of corner and edge-sharing WBr5 square pyramids. There are a spread of W–Br bond distances ranging from 2.52–2.74 Å. In the second W+2.50+ site, W+2.50+ is bonded to five Br1- atoms to form a mixture of corner and edge-sharing WBr5 square pyramids. There are a spread of W–Br bond distances ranging from 2.60–2.72 Å. In the third W+2.50+ site, W+2.50+ is bonded to five Br1- atoms to form a mixture of corner and edge-sharing WBr5 square pyramids. There are a spread of W–Br bond distances ranging from 2.60–2.72 Å. In the fourth W+2.50+ site, W+2.50+ is bonded to five Br1- atoms to form a mixture of corner and edge-sharing WBr5 square pyramids. There are a spread of W–Br bond distances ranging from 2.58–2.85 Å. There are ten inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 2-coordinate geometry to two W+2.50+ atoms. In the second Br1- site, Br1- is bonded in a 2-coordinate geometry to two W+2.50+ atoms. In the third Br1- site, Br1- is bonded in a 2-coordinate geometry to two W+2.50+ atoms. In the fourth Br1- site, Br1- is bonded in a bent 120 degrees geometry to two W+2.50+ atoms. In the fifth Br1- site, Br1- is bonded in a 12-coordinate geometry to three W+2.50+ atoms. In the sixth Br1- site, Br1- is bonded in a single-bond geometry to one W+2.50+ atom. In the seventh Br1- site, Br1- is bonded in a 7-coordinate geometry to two W+2.50+ atoms. In the eighth Br1- site, Br1- is bonded in a water-like geometry to two equivalent W+2.50+ atoms. In the ninth Br1- site, Br1- is bonded in a 2-coordinate geometry to two W+2.50+ atoms. In the tenth Br1- site, Br1- is bonded in a 4-coordinate geometry to two W+2.50+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on UBrO5 by Materials Project

UO5Br crystallizes in the monoclinic P2_1/c space group. The structure is two-dimensional and consists of two UO5Br sheets oriented in the (0, 0, 1) direction. there are two inequivalent U5+ sites. In the first U5+ site, U5+ is bonded to six O2- atoms to form distorted edge-sharing UO6 octahedra. There are a spread of U–O bond distances ranging from 1.82–2.50 Å. In the second U5+ site, U5+ is bonded to six O2- atoms to form distorted edge-sharing UO6 octahedra. There are a spread of U–O bond distances ranging from 1.82–2.49 Å. There are ten inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one U5+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one U5+ and one Br5+ atom. The O–Br bond length is 1.72 Å. In the third O2- site, O2- is bonded in a water-like geometry to two U5+ atoms. In the fourth O2- site, O2- is bonded in a bent 120 degrees geometry to one U5+ and one Br5+ atom. The O–Br bond length is 1.72 Å. In the fifth O2- site, O2- is bonded in a single-bond geometry to one U5+ atom. In the sixth O2- site, O2- is bonded in a bent 120 degrees geometry to one U5+ and one Br5+ atom. The O–Br bond length is 1.72 Å. In the seventh O2- site, O2- is bonded in a bent 150 degrees geometry to one U5+ and one Br5+ atom. The O–Br bond length is 1.72 Å. In the eighth O2- site, O2- is bonded in a single-bond geometry to one U5+ atom. In the ninth O2- site, O2- is bonded in a water-like geometry to two U5+ atoms. In the tenth O2- site, O2- is bonded in a single-bond geometry to one U5+ atom. There are two inequivalent Br5+ sites. In the first Br5+ site, Br5+ is bonded in a water-like geometry to two O2- atoms. In the second Br5+ site, Br5+ is bonded in a bent 120 degrees geometry to two O2- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on CdBi8(Br5O4)2 by Materials Project

CdBi8(O4Br5)2 crystallizes in the orthorhombic Cmmm space group. The structure is two-dimensional and consists of two CdBi8(O4Br5)2 sheets oriented in the (0, 1, 0) direction. Cd2+ is bonded to six Br1- atoms to form corner-sharing CdBr6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are four shorter (2.79 Å) and two longer (3.06 Å) Cd–Br bond lengths. There are three inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded in a 4-coordinate geometry to four equivalent O2- and four equivalent Br1- atoms. All Bi–O bond lengths are 2.35 Å. All Bi–Br bond lengths are 3.22 Å. In the second Bi3+ site, Bi3+ is bonded in a 4-coordinate geometry to four equivalent O2- and four equivalent Br1- atoms. All Bi–O bond lengths are 2.34 Å. All Bi–Br bond lengths are 3.21 Å. In the third Bi3+ site, Bi3+ is bonded in a 4-coordinate geometry to four equivalent O2- and four Br1- atoms. All Bi–O bond lengths are 2.35 Å. There are two shorter (3.20 Å) and two longer (3.24 Å) Bi–Br bond lengths. O2- is bonded to four Bi3+ atoms to form a mixture of corner and edge-sharing OBi4 tetrahedra. There are four inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 4-coordinate geometry to four Bi3+ atoms. In the second Br1- site, Br1- is bonded in a 4-coordinate geometry to four equivalent Bi3+ atoms. In the third Br1- site, Br1- is bonded in a 1-coordinate geometry to one Cd2+ and four equivalent Bi3+ atoms. In the fourth Br1- site, Br1- is bonded in a linear geometry to two equivalent Cd2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on K3Au3Br8 by Materials Project

K3Au3Br8 is Pb (Zr_0.50 Ti_0.48) O_3-like structured and crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 7-coordinate geometry to seven Br1- atoms. There are a spread of K–Br bond distances ranging from 3.40–3.84 Å. In the second K1+ site, K1+ is bonded in a 4-coordinate geometry to six Br1- atoms. There are a spread of K–Br bond distances ranging from 3.35–3.83 Å. There are two inequivalent Au+1.67+ sites. In the first Au+1.67+ site, Au+1.67+ is bonded in an octahedral geometry to six Br1- atoms. There are a spread of Au–Br bond distances ranging from 2.50–3.32 Å. In the second Au+1.67+ site, Au+1.67+ is bonded in a 2-coordinate geometry to five Br1- atoms. There are a spread of Au–Br bond distances ranging from 2.45–3.48 Å. There are four inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 4-coordinate geometry to two equivalent K1+ and two Au+1.67+ atoms. In the second Br1- site, Br1- is bonded to four K1+ and two Au+1.67+ atoms to form a mixture of distorted edge and corner-sharing BrK4Au2 octahedra. The corner-sharing octahedra tilt angles range from 0–53°. In the third Br1- site, Br1- is bonded in a 4-coordinate geometry to two K1+ and two Au+1.67+ atoms. In the fourth Br1- site, Br1- is bonded in a 3-coordinate geometry to two K1+ and two equivalent Au+1.67+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ba2IBrF2 by Materials Project

Ba2IBrF2 crystallizes in the tetragonal P4mm space group. The structure is three-dimensional. there are two inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 4-coordinate geometry to four equivalent I1-, one Br1-, and four equivalent F1- atoms. All Ba–I bond lengths are 3.59 Å. The Ba–Br bond length is 3.89 Å. All Ba–F bond lengths are 2.70 Å. In the second Ba2+ site, Ba2+ is bonded in a 9-coordinate geometry to one I1-, four equivalent Br1-, and four equivalent F1- atoms. The Ba–I bond length is 3.65 Å. All Ba–Br bond lengths are 3.50 Å. All Ba–F bond lengths are 2.73 Å. I1- is bonded in a 5-coordinate geometry to five Ba2+, four equivalent Br1-, and four equivalent F1- atoms. All I–Br bond lengths are 4.06 Å. All I–F bond lengths are 3.70 Å. Br1- is bonded in a 4-coordinate geometry to five Ba2+, four equivalent I1-, and four equivalent F1- atoms. All Br–F bond lengths are 3.55 Å. F1- is bonded to four Ba2+, two equivalent I1-, and two equivalent Br1- atoms to form a mixture of edge and face-sharing FBa4I2Br2 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Te2Pb3(BrO3)2 by Materials Project

Pb3Te2(O3Br)2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are three inequivalent Pb2+ sites. In the first Pb2+ site, Pb2+ is bonded in a 4-coordinate geometry to four O2- and four Br1- atoms. There are two shorter (2.46 Å) and two longer (2.65 Å) Pb–O bond lengths. There are one shorter (3.34 Å) and three longer (3.39 Å) Pb–Br bond lengths. In the second Pb2+ site, Pb2+ is bonded in a 5-coordinate geometry to five O2- and three Br1- atoms. There are a spread of Pb–O bond distances ranging from 2.44–2.71 Å. All Pb–Br bond lengths are 3.45 Å. In the third Pb2+ site, Pb2+ is bonded in a 9-coordinate geometry to eight O2- and one Br1- atom. There are a spread of Pb–O bond distances ranging from 2.57–3.06 Å. The Pb–Br bond length is 3.40 Å. There are two inequivalent Te4+ sites. In the first Te4+ site, Te4+ is bonded to four O2- atoms to form distorted edge-sharing TeO4 trigonal pyramids. There are two shorter (1.96 Å) and two longer (2.09 Å) Te–O bond lengths. In the second Te4+ site, Te4+ is bonded in a 3-coordinate geometry to three O2- and one Br1- atom. There is one shorter (1.88 Å) and two longer (1.91 Å) Te–O bond length. The Te–Br bond length is 3.43 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent Pb2+ and two equivalent Te4+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to three Pb2+ and one Te4+ atom. In the third O2- site, O2- is bonded in a 4-coordinate geometry to three Pb2+ and one Te4+ atom. In the fourth O2- site, O2- is bonded to three Pb2+ and one Te4+ atom to form distorted edge-sharing OTePb3 tetrahedra. There are two inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 5-coordinate geometry to four Pb2+ and one Te4+ atom. In the second Br1- site, Br1- is bonded in a 8-coordinate geometry to four Pb2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cu3Bi2S3Br2 by Materials Project

Cu3Bi2S3Br2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are three inequivalent Cu1+ sites. In the first Cu1+ site, Cu1+ is bonded in a rectangular see-saw-like geometry to two equivalent S2- and two equivalent Br1- atoms. There are one shorter (2.24 Å) and one longer (2.33 Å) Cu–S bond lengths. There are one shorter (2.66 Å) and one longer (2.68 Å) Cu–Br bond lengths. In the second Cu1+ site, Cu1+ is bonded to three S2- and one Br1- atom to form distorted corner-sharing CuS3Br tetrahedra. There are two shorter (2.27 Å) and one longer (2.28 Å) Cu–S bond lengths. The Cu–Br bond length is 2.81 Å. In the third Cu1+ site, Cu1+ is bonded in a trigonal planar geometry to three S2- atoms. There are one shorter (2.23 Å) and two longer (2.24 Å) Cu–S bond lengths. There are two inequivalent Bi+2.50+ sites. In the first Bi+2.50+ site, Bi+2.50+ is bonded in a 7-coordinate geometry to three S2- and four Br1- atoms. There are one shorter (2.67 Å) and two longer (2.70 Å) Bi–S bond lengths. There are a spread of Bi–Br bond distances ranging from 3.26–3.41 Å. In the second Bi+2.50+ site, Bi+2.50+ is bonded in a distorted rectangular see-saw-like geometry to two equivalent S2- and two equivalent Br1- atoms. There are one shorter (2.66 Å) and one longer (2.70 Å) Bi–S bond lengths. There are one shorter (3.24 Å) and one longer (3.36 Å) Bi–Br bond lengths. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded to four Cu1+ and one Bi+2.50+ atom to form distorted SCu4Bi trigonal bipyramids that share corners with four equivalent SCu2Bi2 tetrahedra and corners with four equivalent SCu4Bi trigonal bipyramids. In the second S2- site, S2- is bonded to two equivalent Cu1+ and two equivalent Bi+2.50+ atoms to form a mixture of distorted edge and corner-sharing SCu2Bi2 tetrahedra. In the third S2- site, S2- is bonded to two Cu1+ and two equivalent Bi+2.50+ atoms to form distorted SCu2Bi2 tetrahedra that share corners with four SCu2Bi2 tetrahedra and corners with four equivalent SCu4Bi trigonal bipyramids. There are two inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 4-coordinate geometry to four Bi+2.50+ atoms. In the second Br1- site, Br1- is bonded in a 3-coordinate geometry to three Cu1+ and two equivalent Bi+2.50+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cs2CuBrCl3 by Materials Project

Cs2CuBrCl3 is (La,Ba)CuO4-derived structured and crystallizes in the tetragonal I4mm space group. The structure is three-dimensional. there are two inequivalent Cs1+ sites. In the first Cs1+ site, Cs1+ is bonded in a distorted q6 geometry to four equivalent Br1- and five Cl1- atoms. All Cs–Br bond lengths are 3.64 Å. There are four shorter (3.48 Å) and one longer (3.78 Å) Cs–Cl bond lengths. In the second Cs1+ site, Cs1+ is bonded in a distorted q6 geometry to one Br1- and eight Cl1- atoms. The Cs–Br bond length is 3.73 Å. There are four shorter (3.44 Å) and four longer (3.64 Å) Cs–Cl bond lengths. There are two inequivalent Cu2+ sites. In the first Cu2+ site, Cu2+ is bonded to one Br1- and five Cl1- atoms to form corner-sharing CuBrCl5 octahedra. The corner-sharing octahedral tilt angles are 2°. The Cu–Br bond length is 2.52 Å. There are one shorter (2.34 Å) and four longer (2.57 Å) Cu–Cl bond lengths. In the second Cu2+ site, Cu2+ is bonded to one Br1- and five Cl1- atoms to form corner-sharing CuBrCl5 octahedra. The corner-sharing octahedral tilt angles are 2°. The Cu–Br bond length is 2.52 Å. There are one shorter (2.34 Å) and four longer (2.57 Å) Cu–Cl bond lengths. Br1- is bonded to five Cs1+ and one Cu2+ atom to form distorted BrCs5Cu octahedra that share corners with four equivalent BrCs5Cu octahedra, corners with twelve equivalent ClCs4Cu2 octahedra, edges with four equivalent BrCs5Cu octahedra, and faces with four equivalent ClCs4Cu2 octahedra. The corner-sharing octahedra tilt angles range from 4–57°. There are two inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded to four Cs1+ and two equivalent Cu2+ atoms to form distorted ClCs4Cu2 octahedra that share corners with two equivalent ClCs4Cu2 octahedra, corners with six equivalent BrCs5Cu octahedra, edges with two equivalent ClCs4Cu2 octahedra, faces with two equivalent BrCs5Cu octahedra, and faces with four equivalent ClCs4Cu2 octahedra. The corner-sharing octahedra tilt angles range from 2–57°. In the second Cl1- site, Cl1- is bonded in a distorted single-bond geometry to five Cs1+ and one Cu2+ atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Na4Al2GaSi3BrO12 by Materials Project

Na4GaAl2Si3O12Br crystallizes in the monoclinic Cc space group. The structure is three-dimensional. there are four inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to three O2- and one Br1- atom to form distorted NaBrO3 tetrahedra that share a cornercorner with one AlO4 tetrahedra, corners with two equivalent GaO4 tetrahedra, corners with three NaBrO3 tetrahedra, and corners with three SiO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.32–2.39 Å. The Na–Br bond length is 2.89 Å. In the second Na1+ site, Na1+ is bonded to three O2- and one Br1- atom to form distorted NaBrO3 tetrahedra that share a cornercorner with one GaO4 tetrahedra, corners with two AlO4 tetrahedra, corners with three NaBrO3 tetrahedra, and corners with three SiO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.31–2.39 Å. The Na–Br bond length is 2.90 Å. In the third Na1+ site, Na1+ is bonded to three O2- and one Br1- atom to form distorted NaBrO3 tetrahedra that share corners with three NaBrO3 tetrahedra, corners with three AlO4 tetrahedra, and corners with three SiO4 tetrahedra. There are two shorter (2.36 Å) and one longer (2.38 Å) Na–O bond lengths. The Na–Br bond length is 2.90 Å. In the fourth Na1+ site, Na1+ is bonded to three O2- and one Br1- atom to form distorted NaBrO3 tetrahedra that share a cornercorner with one GaO4 tetrahedra, corners with two AlO4 tetrahedra, corners with three NaBrO3 tetrahedra, and corners with three SiO4 tetrahedra. There are a spread of Na–O bond distances ranging from 2.33–2.39 Å. The Na–Br bond length is 2.90 Å. Ga3+ is bonded to four O2- atoms to form GaO4 tetrahedra that share corners with four NaBrO3 tetrahedra and corners with four SiO4 tetrahedra. All Ga–O bond lengths are 1.84 Å. There are two inequivalent Al3+ sites. In the first Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share corners with four NaBrO3 tetrahedra and corners with four SiO4 tetrahedra. All Al–O bond lengths are 1.76 Å. In the second Al3+ site, Al3+ is bonded to four O2- atoms to form AlO4 tetrahedra that share corners with four NaBrO3 tetrahedra and corners with four SiO4 tetrahedra. There is two shorter (1.76 Å) and two longer (1.77 Å) Al–O bond length. There are three inequivalent Si4+ sites. In the first Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one GaO4 tetrahedra, corners with three AlO4 tetrahedra, and corners with four NaBrO3 tetrahedra. All Si–O bond lengths are 1.64 Å. In the second Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share corners with two equivalent GaO4 tetrahedra, corners with two equivalent AlO4 tetrahedra, and corners with four NaBrO3 tetrahedra. There is three shorter (1.64 Å) and one longer (1.65 Å) Si–O bond length. In the third Si4+ site, Si4+ is bonded to four O2- atoms to form SiO4 tetrahedra that share a cornercorner with one GaO4 tetrahedra, corners with three AlO4 tetrahedra, and corners with four NaBrO3 tetrahedra. All Si–O bond lengths are 1.64 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+, one Ga3+, and one Si4+ atom. In the second O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Al3+, and one Si4+ atom. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+, one Ga3+, and one Si4+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Al3+, and one Si4+ atom. In the fifth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Al3+, and one Si4+ atom. In the sixth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+, one Ga3+, and one Si4+ atom. In the seventh O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Al3+, and one Si4+ atom. In the eighth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Al3+, and one Si4+ atom. In the ninth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Al3+, and one Si4+ atom. In the tenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Na1+, one Ga3+, and one Si4+ atom. In the eleventh O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Al3+, and one Si4+ atom. In the twelfth O2- site, O2- is bonded in a 3-coordinate geometry to one Na1+, one Al3+, and one Si4+ atom. Br1- is bonded in a tetrahedral geometry to four Na1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ca2Cd(BrO2)6 by Materials Project

(Ca(O2Br)3)2Cd crystallizes in the monoclinic C2/c space group. The structure is one-dimensional and consists of four cadmium molecules and two Ca(O2Br)3 ribbons oriented in the (1, 1, 0) direction. In each Ca(O2Br)3 ribbon, Ca2+ is bonded to six O2- atoms to form distorted edge-sharing CaO6 pentagonal pyramids. There are a spread of Ca–O bond distances ranging from 2.29–2.70 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Ca2+ and one Br3+ atom. The O–Br bond length is 1.74 Å. In the second O2- site, O2- is bonded in a 2-coordinate geometry to one Ca2+ and one O2- atom. The O–O bond length is 1.25 Å. In the third O2- site, O2- is bonded in a single-bond geometry to one O2- atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Ca2+ and one Br3+ atom. The O–Br bond length is 1.81 Å. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to one Ca2+ and one Br3+ atom. The O–Br bond length is 1.80 Å. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to one Ca2+ and one Br3+ atom. The O–Br bond length is 1.71 Å. There are three inequivalent Br3+ sites. In the first Br3+ site, Br3+ is bonded in a single-bond geometry to one O2- atom. In the second Br3+ site, Br3+ is bonded in a water-like geometry to two O2- atoms. In the third Br3+ site, Br3+ is bonded in a single-bond geometry to one O2- atom.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Cs4Zr6BBr17 by Materials Project

Cs4Zr6BBr17 crystallizes in the tetragonal P-42_1m space group. The structure is three-dimensional. Cs1+ is bonded in a 10-coordinate geometry to ten Br1- atoms. There are a spread of Cs–Br bond distances ranging from 3.41–4.17 Å. There are three inequivalent Zr+2.67+ sites. In the first Zr+2.67+ site, Zr+2.67+ is bonded to one B3- and five Br1- atoms to form a mixture of edge and corner-sharing ZrBBr5 octahedra. The corner-sharing octahedral tilt angles are 0°. The Zr–B bond length is 2.36 Å. There are a spread of Zr–Br bond distances ranging from 2.69–2.86 Å. In the second Zr+2.67+ site, Zr+2.67+ is bonded to one B3- and five Br1- atoms to form a mixture of edge and corner-sharing ZrBBr5 octahedra. The corner-sharing octahedra tilt angles range from 0–46°. The Zr–B bond length is 2.35 Å. There are a spread of Zr–Br bond distances ranging from 2.70–2.98 Å. In the third Zr+2.67+ site, Zr+2.67+ is bonded to one B3- and five Br1- atoms to form a mixture of edge and corner-sharing ZrBBr5 octahedra. The corner-sharing octahedra tilt angles range from 1–46°. The Zr–B bond length is 2.34 Å. There are four shorter (2.71 Å) and one longer (3.01 Å) Zr–Br bond lengths. B3- is bonded in an octahedral geometry to six Zr+2.67+ atoms. There are eight inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 1-coordinate geometry to four equivalent Cs1+ and one Zr+2.67+ atom. In the second Br1- site, Br1- is bonded in a 2-coordinate geometry to four equivalent Cs1+ and two equivalent Zr+2.67+ atoms. In the third Br1- site, Br1- is bonded in a 2-coordinate geometry to one Cs1+ and two Zr+2.67+ atoms. In the fourth Br1- site, Br1- is bonded in a 2-coordinate geometry to two equivalent Cs1+ and two Zr+2.67+ atoms. In the fifth Br1- site, Br1- is bonded in a 2-coordinate geometry to four equivalent Cs1+ and two equivalent Zr+2.67+ atoms. In the sixth Br1- site, Br1- is bonded in a tetrahedral geometry to four equivalent Cs1+ atoms. In the seventh Br1- site, Br1- is bonded in a 4-coordinate geometry to two equivalent Cs1+ and two Zr+2.67+ atoms. In the eighth Br1- site, Br1- is bonded in a 2-coordinate geometry to two equivalent Cs1+ and two Zr+2.67+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Sb4BrO6 by Materials Project

Sb4O6Br crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are four inequivalent Sb+3.25+ sites. In the first Sb+3.25+ site, Sb+3.25+ is bonded to four O2- atoms to form distorted corner-sharing SbO4 trigonal pyramids. There are a spread of Sb–O bond distances ranging from 2.02–2.20 Å. In the second Sb+3.25+ site, Sb+3.25+ is bonded in a distorted rectangular see-saw-like geometry to four O2- and two equivalent Br1- atoms. There are a spread of Sb–O bond distances ranging from 2.00–2.20 Å. Both Sb–Br bond lengths are 3.41 Å. In the third Sb+3.25+ site, Sb+3.25+ is bonded in a distorted square co-planar geometry to four O2- atoms. There are a spread of Sb–O bond distances ranging from 1.98–2.16 Å. In the fourth Sb+3.25+ site, Sb+3.25+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There are a spread of Sb–O bond distances ranging from 2.01–2.17 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three Sb+3.25+ and one Br1- atom. The O–Br bond length is 3.54 Å. In the second O2- site, O2- is bonded in a 3-coordinate geometry to three Sb+3.25+ and two equivalent Br1- atoms. There are one shorter (3.45 Å) and one longer (3.63 Å) O–Br bond lengths. In the third O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to three Sb+3.25+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to three Sb+3.25+ and one Br1- atom. The O–Br bond length is 3.44 Å. In the fifth O2- site, O2- is bonded in a bent 120 degrees geometry to two Sb+3.25+ atoms. In the sixth O2- site, O2- is bonded in a bent 120 degrees geometry to two Sb+3.25+ atoms. Br1- is bonded in a 4-coordinate geometry to two equivalent Sb+3.25+ and four O2- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Ag4Hg4S4BrCl3 by Materials Project

Ag4Hg4S4BrCl3 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are four inequivalent Ag1+ sites. In the first Ag1+ site, Ag1+ is bonded to two equivalent S2- and two Cl1- atoms to form distorted AgS2Cl2 trigonal pyramids that share corners with eight HgS2Cl4 octahedra, corners with two equivalent AgS2Cl2 trigonal pyramids, edges with two equivalent HgS2Br2Cl2 octahedra, and an edgeedge with one AgS2Cl2 trigonal pyramid. The corner-sharing octahedra tilt angles range from 45–81°. There are one shorter (2.54 Å) and one longer (2.56 Å) Ag–S bond lengths. There are one shorter (2.55 Å) and one longer (3.14 Å) Ag–Cl bond lengths. In the second Ag1+ site, Ag1+ is bonded to two equivalent S2- and two Cl1- atoms to form distorted AgS2Cl2 trigonal pyramids that share corners with eight HgS2Br2Cl2 octahedra, corners with two equivalent AgS2Cl2 trigonal pyramids, edges with two equivalent HgS2Cl4 octahedra, and an edgeedge with one AgS2Cl2 trigonal pyramid. The corner-sharing octahedra tilt angles range from 45–80°. There are one shorter (2.54 Å) and one longer (2.56 Å) Ag–S bond lengths. There are one shorter (2.54 Å) and one longer (3.13 Å) Ag–Cl bond lengths. In the third Ag1+ site, Ag1+ is bonded to two equivalent S2-, one Br1-, and one Cl1- atom to form distorted AgS2BrCl trigonal pyramids that share corners with eight HgS2Br2Cl2 octahedra, corners with two equivalent AgS2BrCl trigonal pyramids, edges with two equivalent HgS2Br2Cl2 octahedra, and an edgeedge with one AgS2BrCl trigonal pyramid. The corner-sharing octahedra tilt angles range from 45–79°. There are one shorter (2.57 Å) and one longer (2.59 Å) Ag–S bond lengths. The Ag–Br bond length is 3.12 Å. The Ag–Cl bond length is 2.56 Å. In the fourth Ag1+ site, Ag1+ is bonded to two equivalent S2-, one Br1-, and one Cl1- atom to form distorted AgS2BrCl trigonal pyramids that share corners with eight HgS2Br2Cl2 octahedra, corners with two equivalent AgS2BrCl trigonal pyramids, edges with two equivalent HgS2Cl4 octahedra, and an edgeedge with one AgS2BrCl trigonal pyramid. The corner-sharing octahedra tilt angles range from 43–80°. There are one shorter (2.52 Å) and one longer (2.55 Å) Ag–S bond lengths. The Ag–Br bond length is 2.65 Å. The Ag–Cl bond length is 3.17 Å. There are four inequivalent Hg2+ sites. In the first Hg2+ site, Hg2+ is bonded to two S2-, two equivalent Br1-, and two equivalent Cl1- atoms to form HgS2Br2Cl2 octahedra that share corners with four equivalent HgS2Br2Cl2 octahedra, corners with eight AgS2Cl2 trigonal pyramids, edges with two equivalent HgS2Br2Cl2 octahedra, edges with two equivalent AgS2Cl2 trigonal pyramids, and faces with two equivalent HgS2Br2Cl2 octahedra. The corner-sharing octahedra tilt angles range from 58–60°. There are one shorter (2.42 Å) and one longer (2.43 Å) Hg–S bond lengths. There are one shorter (3.22 Å) and one longer (3.25 Å) Hg–Br bond lengths. There are one shorter (3.34 Å) and one longer (3.35 Å) Hg–Cl bond lengths. In the second Hg2+ site, Hg2+ is bonded to two S2- and four Cl1- atoms to form distorted HgS2Cl4 octahedra that share corners with four equivalent HgS2Cl4 octahedra, corners with eight AgS2Cl2 trigonal pyramids, edges with two equivalent HgS2Cl4 octahedra, edges with two equivalent AgS2Cl2 trigonal pyramids, and faces with two equivalent HgS2Cl4 octahedra. The corner-sharing octahedra tilt angles range from 57–59°. Both Hg–S bond lengths are 2.41 Å. There are a spread of Hg–Cl bond distances ranging from 3.16–3.36 Å. In the third Hg2+ site, Hg2+ is bonded to two S2-, two equivalent Br1-, and two equivalent Cl1- atoms to form distorted HgS2Br2Cl2 octahedra that share corners with four equivalent HgS2Br2Cl2 octahedra, corners with eight AgS2Cl2 trigonal pyramids, edges with two equivalent HgS2Br2Cl2 octahedra, edges with two equivalent AgS2BrCl trigonal pyramids, and faces with two equivalent HgS2Br2Cl2 octahedra. The corner-sharing octahedra tilt angles range from 58–60°. Both Hg–S bond lengths are 2.42 Å. There are one shorter (3.37 Å) and one longer (3.42 Å) Hg–Br bond lengths. There are one shorter (3.17 Å) and one longer (3.21 Å) Hg–Cl bond lengths. In the fourth Hg2+ site, Hg2+ is bonded to two S2- and four Cl1- atoms to form distorted HgS2Cl4 octahedra that share corners with four equivalent HgS2Cl4 octahedra, corners with eight AgS2Cl2 trigonal pyramids, edges with two equivalent HgS2Cl4 octahedra, edges with two equivalent AgS2BrCl trigonal pyramids, and faces with two equivalent HgS2Cl4 octahedra. The corner-sharing octahedra tilt angles range from 57–59°. Both Hg–S bond lengths are 2.41 Å. There are a spread of Hg–Cl bond distances ranging from 3.19–3.41 Å. There are four inequivalent S2- sites. In the first S2- site, S2- is bonded to two equivalent Ag1+ and two Hg2+ atoms to form corner-sharing SAg2Hg2 trigonal pyramids. In the second S2- site, S2- is bonded to two equivalent Ag1+ and two Hg2+ atoms to form corner-sharing SAg2Hg2 trigonal pyramids. In the third S2- site, S2- is bonded to two equivalent Ag1+ and two Hg2+ atoms to form corner-sharing SAg2Hg2 trigonal pyramids. In the fourth S2- site, S2- is bonded to two equivalent Ag1+ and two Hg2+ atoms to form corner-sharing SAg2Hg2 trigonal pyramids. Br1- is bonded in a 1-coordinate geometry to two Ag1+ and four Hg2+ atoms. There are three inequivalent Cl1- sites. In the first Cl1- site, Cl1- is bonded in a 1-coordinate geometry to two Ag1+ and four Hg2+ atoms. In the second Cl1- site, Cl1- is bonded in a 1-coordinate geometry to two Ag1+ and four Hg2+ atoms. In the third Cl1- site, Cl1- is bonded in a 1-coordinate geometry to two Ag1+ and four Hg2+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NaBi3(BrO2)2 by Materials Project

NaBi3(O2Br)2 crystallizes in the orthorhombic Amm2 space group. The structure is three-dimensional. Na1+ is bonded in a 4-coordinate geometry to four equivalent O2- and four Br1- atoms. All Na–O bond lengths are 2.40 Å. There are two shorter (3.42 Å) and two longer (3.46 Å) Na–Br bond lengths. There are three inequivalent Bi3+ sites. In the first Bi3+ site, Bi3+ is bonded in a 4-coordinate geometry to four equivalent O2- and four Br1- atoms. All Bi–O bond lengths are 2.25 Å. There are two shorter (3.47 Å) and two longer (3.51 Å) Bi–Br bond lengths. In the second Bi3+ site, Bi3+ is bonded in a 4-coordinate geometry to four equivalent O2- and four Br1- atoms. All Bi–O bond lengths are 2.28 Å. There are two shorter (3.48 Å) and two longer (3.53 Å) Bi–Br bond lengths. In the third Bi3+ site, Bi3+ is bonded in a 4-coordinate geometry to four equivalent O2- and four Br1- atoms. All Bi–O bond lengths are 2.28 Å. There are two shorter (3.48 Å) and two longer (3.52 Å) Bi–Br bond lengths. O2- is bonded to one Na1+ and three Bi3+ atoms to form a mixture of edge and corner-sharing ONaBi3 tetrahedra. There are two inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a distorted body-centered cubic geometry to two equivalent Na1+ and six Bi3+ atoms. In the second Br1- site, Br1- is bonded in a body-centered cubic geometry to two equivalent Na1+ and six Bi3+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2024

Identification and Suppression of Point Defects in Bromide Perovskite Single Crystals Enabling Gamma‐Ray Spectroscopy

Abstract Methylammonium lead tribromide (MAPbBr 3 ) stands out as the most easily grown wide‐band‐gap metal halide perovskite. It is a promising semiconductor for room‐temperature gamma‐ray ( γ ‐ray) spectroscopic detectors, but no operational devices are realized. This can be largely attributed to a lack of understanding of point defects and their influence on detector performance. Here, through a combination of crystal growth design and defect characterization, including positron annihilation and impedance spectroscopy, the presence of specific point defects are identified and correlated to detector performance. Methylammonium (MA) vacancies, MA interstitials, and Pb vacancies are identified as the dominant charge‐trapping defects in MAPbBr 3 crystals, while Br vacancies caused doping. The addition of excess MABr reduces the MA and Br defects and so enables the detection of energy‐resolved γ ‐ray spectra using a MAPbBr 3 single‐crystal device. Interestingly, the addition of formamidinium (FA) cations, which converted to methylformamidinium (MFA) cations by reaction with MA + during crystal growth further reduced MA defects. This enabled an energy resolution of 3.9% for the 662 keV 137 Cs line using a low bias of 100 V. The work provides direction toward enabling further improvements in wide‐bandgap perovskite‐based device performance by reducing detrimental defects.

Ni, Zhenyi↗