cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17188/1263243
title: Materials Data on Na4Sn3O8 by Materials Project

description: Na4Sn3O8 crystallizes in the cubic P4_132 space group. The structure is three-dimensional. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded to six O2- atoms to form distorted NaO6 octahedra that share corners with two equivalent NaO6 octahedra, corners with four equivalent SnO6 octahedra, edges with five NaO6 octahedra, and edges with five equivalent SnO6 octahedra. The corner-sharing octahedra tilt angles range from 8–21°. There are a spread of Na–O bond distances ranging from 2.30–2.58 Å. In the second Na1+ site, Na1+ is bonded to six equivalent O2- atoms to form distorted NaO6 octahedra that share corners with six equivalent NaO6 octahedra, edges with three equivalent NaO6 octahedra, and edges with six equivalent SnO6 octahedra. The corner-sharing octahedral tilt angles are 21°. All Na–O bond lengths are 2.46 Å. Sn4+ is bonded to six O2- atoms to form SnO6 octahedra that share corners with four equivalent NaO6 octahedra, edges with four equivalent SnO6 octahedra, and edges with seven NaO6 octahedra. The corner-sharing octahedra tilt angles range from 8–14°. There are a spread of Sn–O bond distances ranging from 2.08–2.22 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to three Na1+ and two equivalent Sn4+ atoms to form ONa3Sn2 square pyramids that share corners with two equivalent ONa3Sn3 octahedra, corners with seven equivalent ONa3Sn2 square pyramids, edges with three equivalent ONa3Sn3 octahedra, and edges with five equivalent ONa3Sn2 square pyramids. The corner-sharing octahedra tilt angles range from 4–12°. In the second O2- site, O2- is bonded to three equivalent Na1+ and three equivalent Sn4+ atoms to form ONa3Sn3 octahedra that share corners with six equivalent ONa3Sn2 square pyramids, edges with three equivalent ONa3Sn3 octahedra, and edges with nine equivalent ONa3Sn2 square pyramids.
DOI: 10.17188/1263245
title: Materials Data on Nb4CrS8 by Materials Project

description: Nb4CrS8 crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. there are two inequivalent Nb+3.50+ sites. In the first Nb+3.50+ site, Nb+3.50+ is bonded to six S2- atoms to form distorted NbS6 pentagonal pyramids that share corners with four equivalent CrS6 octahedra and edges with six NbS6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 48°. There are two shorter (2.46 Å) and four longer (2.52 Å) Nb–S bond lengths. In the second Nb+3.50+ site, Nb+3.50+ is bonded to six equivalent S2- atoms to form distorted NbS6 pentagonal pyramids that share edges with six equivalent NbS6 pentagonal pyramids and faces with two equivalent CrS6 octahedra. All Nb–S bond lengths are 2.49 Å. Cr2+ is bonded to six equivalent S2- atoms to form CrS6 octahedra that share corners with twelve equivalent NbS6 pentagonal pyramids and faces with two equivalent NbS6 pentagonal pyramids. All Cr–S bond lengths are 2.41 Å. There are two inequivalent S2- sites. In the first S2- site, S2- is bonded in a rectangular see-saw-like geometry to three Nb+3.50+ and one Cr2+ atom. In the second S2- site, S2- is bonded in a 3-coordinate geometry to three equivalent Nb+3.50+ atoms.
DOI: 10.17188/1263255
title: Materials Data on TlW3Br7 by Materials Project

description: W3TlBr7 crystallizes in the orthorhombic Pnnn space group. The structure is three-dimensional. there are three 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 TlBr6 octahedra and edges with four WBr5 square pyramids. The corner-sharing octahedral tilt angles are 52°. There are a spread of W–Br bond distances ranging from 2.61–2.66 Å. In the second W2+ site, W2+ is bonded to five Br1- atoms to form WBr5 square pyramids that share a cornercorner with one TlBr6 octahedra and edges with four WBr5 square pyramids. The corner-sharing octahedral tilt angles are 53°. There are four shorter (2.65 Å) and one longer (2.67 Å) W–Br bond lengths. In the third W2+ site, W2+ is bonded to five Br1- atoms to form WBr5 square pyramids that share a cornercorner with one TlBr6 octahedra and edges with four WBr5 square pyramids. The corner-sharing octahedral tilt angles are 53°. There are three shorter (2.65 Å) and two longer (2.66 Å) W–Br bond lengths. There are three inequivalent Tl1+ sites. In the first Tl1+ site, Tl1+ is bonded in a 8-coordinate geometry to eight Br1- atoms. There are four shorter (3.36 Å) and four longer (3.62 Å) Tl–Br bond lengths. In the second Tl1+ site, Tl1+ is bonded in a 8-coordinate geometry to eight Br1- atoms. There are four shorter (3.35 Å) and four longer (3.62 Å) Tl–Br bond lengths. In the third Tl1+ site, Tl1+ is bonded to six Br1- atoms to form TlBr6 octahedra that share corners with six WBr5 square pyramids. There are a spread of Tl–Br bond distances ranging from 3.37–3.52 Å. There are seven inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 4-coordinate geometry to three W2+ and one Tl1+ atom. In the second Br1- site, Br1- is bonded in a distorted bent 120 degrees geometry to one W2+ and one Tl1+ atom. In the third Br1- site, Br1- is bonded in a distorted trigonal planar geometry to one W2+ and two Tl1+ atoms. In the fourth Br1- site, Br1- is bonded in a 8-coordinate geometry to three W2+ atoms. In the fifth Br1- site, Br1- is bonded in a 6-coordinate geometry to three W2+ atoms. In the sixth Br1- site, Br1- is bonded in a 4-coordinate geometry to three W2+ and one Tl1+ atom. In the seventh Br1- site, Br1- is bonded in a distorted trigonal planar geometry to one W2+ and two Tl1+ atoms.
DOI: 10.17188/1263256
title: Materials Data on Ba14AlSb11 by Materials Project

description: Ba14AlSb11 crystallizes in the tetragonal I4_1/acd space group. The structure is three-dimensional. there are four inequivalent Ba2+ sites. In the first Ba2+ site, Ba2+ is bonded in a 6-coordinate geometry to six Sb+2.82- atoms. There are a spread of Ba–Sb bond distances ranging from 3.52–4.12 Å. In the second Ba2+ site, Ba2+ is bonded to six Sb+2.82- atoms to form distorted BaSb6 octahedra that share corners with four BaSb6 octahedra, corners with five equivalent BaSb6 pentagonal pyramids, corners with two equivalent AlSb4 tetrahedra, edges with two equivalent BaSb6 octahedra, faces with two BaSb6 octahedra, and faces with three equivalent BaSb6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 37–54°. There are a spread of Ba–Sb bond distances ranging from 3.54–3.76 Å. In the third Ba2+ site, Ba2+ is bonded to six Sb+2.82- atoms to form distorted BaSb6 pentagonal pyramids that share corners with eight BaSb6 octahedra, a cornercorner with one BaSb6 pentagonal pyramid, edges with two equivalent BaSb6 pentagonal pyramids, an edgeedge with one AlSb4 tetrahedra, faces with four BaSb6 octahedra, and a faceface with one BaSb6 pentagonal pyramid. The corner-sharing octahedra tilt angles range from 23–79°. There are a spread of Ba–Sb bond distances ranging from 3.48–4.02 Å. In the fourth Ba2+ site, Ba2+ is bonded to six Sb+2.82- atoms to form BaSb6 octahedra that share corners with eight BaSb6 octahedra, corners with six equivalent BaSb6 pentagonal pyramids, corners with two equivalent AlSb4 tetrahedra, faces with two equivalent BaSb6 octahedra, and faces with two equivalent BaSb6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 39–55°. There are a spread of Ba–Sb bond distances ranging from 3.45–3.80 Å. Al3+ is bonded to four equivalent Sb+2.82- atoms to form AlSb4 tetrahedra that share corners with twelve BaSb6 octahedra and edges with four equivalent BaSb6 pentagonal pyramids. The corner-sharing octahedra tilt angles range from 39–47°. All Al–Sb bond lengths are 2.83 Å. There are four inequivalent Sb+2.82- sites. In the first Sb+2.82- site, Sb+2.82- is bonded in a 9-coordinate geometry to eight Ba2+ and one Sb+2.82- atom. The Sb–Sb bond length is 3.40 Å. In the second Sb+2.82- site, Sb+2.82- is bonded in a 10-coordinate geometry to eight Ba2+ and two equivalent Sb+2.82- atoms. In the third Sb+2.82- site, Sb+2.82- is bonded in a 7-coordinate geometry to eight Ba2+ atoms. In the fourth Sb+2.82- site, Sb+2.82- is bonded in a 8-coordinate geometry to seven Ba2+ and one Al3+ atom.
DOI: 10.17188/1263261
title: Materials Data on U7(Te12O35)2 by Materials Project

description: U7(Te12O35)2 crystallizes in the trigonal R-3 space group. The structure is three-dimensional. there are three inequivalent U sites. In the first U site, U is bonded to eight O atoms to form distorted UO8 hexagonal bipyramids that share edges with two equivalent TeO5 square pyramids. There are a spread of U–O bond distances ranging from 1.83–2.51 Å. In the second U site, U is bonded to eight O atoms to form distorted UO8 hexagonal bipyramids that share edges with six equivalent TeO5 square pyramids. There are two shorter (1.83 Å) and six longer (2.46 Å) U–O bond lengths. In the third U site, U is bonded to eight O atoms to form distorted UO8 hexagonal bipyramids that share edges with four TeO5 square pyramids. There are a spread of U–O bond distances ranging from 1.83–2.48 Å. There are four inequivalent Te sites. In the first Te site, Te is bonded to five O atoms to form distorted TeO5 square pyramids that share corners with three TeO5 square pyramids and edges with two UO8 hexagonal bipyramids. There are a spread of Te–O bond distances ranging from 1.91–2.40 Å. In the second Te site, Te is bonded in a 5-coordinate geometry to five O atoms. There are a spread of Te–O bond distances ranging from 1.91–2.66 Å. In the third Te site, Te is bonded in a 5-coordinate geometry to five O atoms. There are a spread of Te–O bond distances ranging from 1.92–2.48 Å. In the fourth Te site, Te is bonded to five O atoms to form distorted TeO5 square pyramids that share corners with three TeO5 square pyramids and edges with two UO8 hexagonal bipyramids. There are a spread of Te–O bond distances ranging from 1.92–2.40 Å. There are thirteen inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one U atom. In the second O site, O is bonded in a single-bond geometry to one U atom. In the third O site, O is bonded in a distorted trigonal planar geometry to one U and two Te atoms. In the fourth O site, O is bonded in a distorted trigonal planar geometry to one U and two Te atoms. In the fifth O site, O is bonded in a distorted trigonal non-coplanar geometry to one U and two Te atoms. In the sixth O site, O is bonded in a distorted trigonal planar geometry to one U and two Te atoms. In the seventh O site, O is bonded in a trigonal planar geometry to three equivalent Te atoms. In the eighth O site, O is bonded in a distorted bent 120 degrees geometry to three Te atoms. In the ninth O site, O is bonded in a distorted trigonal planar geometry to one U and two equivalent Te atoms. In the tenth O site, O is bonded in a single-bond geometry to one U atom. In the eleventh O site, O is bonded in a distorted trigonal planar geometry to one U and two Te atoms. In the twelfth O site, O is bonded in a distorted trigonal planar geometry to one U and two Te atoms. In the thirteenth O site, O is bonded in a bent 120 degrees geometry to two equivalent Te atoms.
DOI: 10.17188/1263265
title: Materials Data on LaTa3O9 by Materials Project

description: LaTa3O9 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. La3+ is bonded in a 9-coordinate geometry to nine O2- atoms. There are a spread of La–O bond distances ranging from 2.47–2.80 Å. There are two inequivalent Ta5+ sites. In the first Ta5+ site, Ta5+ is bonded to seven O2- atoms to form distorted TaO7 pentagonal bipyramids that share a cornercorner with one TaO6 octahedra, corners with two equivalent TaO7 pentagonal bipyramids, an edgeedge with one TaO6 octahedra, and edges with two equivalent TaO7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 35°. There are a spread of Ta–O bond distances ranging from 1.96–2.21 Å. In the second Ta5+ site, Ta5+ is bonded to six O2- atoms to form TaO6 octahedra that share corners with two equivalent TaO6 octahedra, corners with two equivalent TaO7 pentagonal bipyramids, and edges with two equivalent TaO7 pentagonal bipyramids. The corner-sharing octahedral tilt angles are 28°. There is two shorter (1.98 Å) and four longer (2.00 Å) Ta–O bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a 4-coordinate geometry to two equivalent La3+ and two Ta5+ atoms. In the second O2- site, O2- is bonded in a 3-coordinate geometry to three Ta5+ atoms. In the third O2- site, O2- is bonded in a distorted linear geometry to one La3+ and two equivalent Ta5+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one La3+ and two equivalent Ta5+ atoms. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one La3+ and two equivalent Ta5+ atoms. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to one La3+ and two equivalent Ta5+ atoms.
DOI: 10.17188/1263271
title: Materials Data on Ta2CuO6 by Materials Project

description: CuTa2O6 crystallizes in the orthorhombic Pmmm space group. The structure is three-dimensional. there are two inequivalent Ta5+ sites. In the first Ta5+ site, Ta5+ is bonded to six O2- atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedra tilt angles range from 27–43°. There are a spread of Ta–O bond distances ranging from 1.94–2.06 Å. In the second Ta5+ site, Ta5+ is bonded to six O2- atoms to form corner-sharing TaO6 octahedra. The corner-sharing octahedra tilt angles range from 28–41°. There are a spread of Ta–O bond distances ranging from 1.94–2.05 Å. There are six inequivalent Cu2+ sites. In the first Cu2+ site, Cu2+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Cu–O bond lengths are 1.99 Å. In the second Cu2+ site, Cu2+ is bonded in a rectangular see-saw-like geometry to four O2- atoms. There is two shorter (1.98 Å) and two longer (2.01 Å) Cu–O bond length. In the third Cu2+ site, Cu2+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Cu–O bond lengths are 1.99 Å. In the fourth Cu2+ site, Cu2+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Cu–O bond lengths are 1.99 Å. In the fifth Cu2+ site, Cu2+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Cu–O bond lengths are 1.99 Å. In the sixth Cu2+ site, Cu2+ is bonded in a square co-planar geometry to four equivalent O2- atoms. All Cu–O bond lengths are 1.99 Å. There are eleven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Ta5+ and one Cu2+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Ta5+ atoms. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to two Ta5+ and one Cu2+ atom. In the fourth O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Ta5+ atoms. In the fifth O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Ta5+ atoms. In the sixth O2- site, O2- is bonded in a bent 150 degrees geometry to two equivalent Ta5+ atoms. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Ta5+ and one Cu2+ atom. In the eighth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Ta5+ and one Cu2+ atom. In the ninth O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Ta5+ and one Cu2+ atom. In the tenth O2- site, O2- is bonded in a trigonal planar geometry to two equivalent Ta5+ and one Cu2+ atom. In the eleventh O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Ta5+ and one Cu2+ atom.
DOI: 10.17188/1263278
title: Materials Data on KAuF4 by Materials Project

description: KAuF4 crystallizes in the tetragonal I4/mcm space group. The structure is three-dimensional. K1+ is bonded in a 8-coordinate geometry to eight equivalent F1- atoms. All K–F bond lengths are 2.77 Å. Au3+ is bonded in a square co-planar geometry to four equivalent F1- atoms. All Au–F bond lengths are 1.97 Å. F1- is bonded in a distorted trigonal planar geometry to two equivalent K1+ and one Au3+ atom.
DOI: 10.17188/1263279
title: Materials Data on Ba23U8O48 by Materials Project

description: Ba23U8O48 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. there are four inequivalent Ba sites. In the first Ba site, Ba is bonded to six O atoms to form BaO6 octahedra that share corners with six UO6 octahedra and faces with four equivalent BaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–3°. All Ba–O bond lengths are 2.54 Å. In the second Ba site, Ba is bonded to twelve O atoms to form distorted BaO12 cuboctahedra that share corners with six equivalent BaO12 cuboctahedra, faces with three equivalent BaO12 cuboctahedra, faces with four BaO6 octahedra, and faces with four UO6 octahedra. There are a spread of Ba–O bond distances ranging from 3.07–3.46 Å. In the third Ba site, Ba is bonded to six equivalent O atoms to form BaO6 octahedra that share corners with six equivalent UO6 octahedra and faces with eight equivalent BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Ba–O bond lengths are 2.56 Å. In the fourth Ba site, Ba is bonded in a 9-coordinate geometry to nine O atoms. There are three shorter (2.82 Å) and six longer (3.26 Å) Ba–O bond lengths. There are two inequivalent U sites. In the first U site, U is bonded to six equivalent O atoms to form UO6 octahedra that share corners with six equivalent BaO6 octahedra and faces with four equivalent BaO12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All U–O bond lengths are 2.07 Å. In the second U site, U is bonded to six O atoms to form UO6 octahedra that share corners with five BaO6 octahedra and faces with four equivalent BaO12 cuboctahedra. The corner-sharing octahedra tilt angles range from 0–3°. There are a spread of U–O bond distances ranging from 2.05–2.16 Å. There are four inequivalent O sites. In the first O site, O is bonded in a distorted linear geometry to five Ba and one U atom. In the second O site, O is bonded to four equivalent Ba and one U atom to form distorted edge-sharing OBa4U square pyramids. In the third O site, O is bonded in a distorted square co-planar geometry to three Ba and one U atom. In the fourth O site, O is bonded in a distorted linear geometry to five Ba and one U atom.
DOI: 10.5281/zenodo.4479205
title: Dublin Electricity Substation Names 2021

description: Combines Dublin stations listed in Ireland Distribution Capacity Enquiry 2017 with stations provided by the ESB via a Codema request.
DOI: 10.17188/1263288
title: Materials Data on K4Si23 by Materials Project

description: K4Si23 crystallizes in the cubic Pm-3n space group. The structure is three-dimensional. there are three inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 8-coordinate geometry to twenty Si+0.17- atoms. There are eight shorter (3.31 Å) and twelve longer (3.40 Å) K–Si bond lengths. In the second K1+ site, K1+ is bonded in a 12-coordinate geometry to twelve Si+0.17- atoms. There are eight shorter (3.49 Å) and four longer (3.66 Å) K–Si bond lengths. In the third K1+ site, K1+ is bonded in a 12-coordinate geometry to twelve Si+0.17- atoms. There are eight shorter (3.49 Å) and four longer (3.66 Å) K–Si bond lengths. There are ten inequivalent Si+0.17- sites. In the first Si+0.17- site, Si+0.17- is bonded in a 7-coordinate geometry to three K1+ and four Si+0.17- atoms. There are a spread of Si–Si bond distances ranging from 2.39–2.46 Å. In the second Si+0.17- site, Si+0.17- is bonded in a 7-coordinate geometry to three K1+ and four Si+0.17- atoms. There are a spread of Si–Si bond distances ranging from 2.39–2.46 Å. In the third Si+0.17- site, Si+0.17- is bonded in a 7-coordinate geometry to three K1+ and four Si+0.17- atoms. There are a spread of Si–Si bond distances ranging from 2.39–2.46 Å. In the fourth Si+0.17- site, Si+0.17- is bonded to four K1+ and four Si+0.17- atoms to form a mixture of distorted corner and edge-sharing SiK4Si4 tetrahedra. The Si–Si bond length is 2.42 Å. In the fifth Si+0.17- site, Si+0.17- is bonded to four equivalent K1+ and four equivalent Si+0.17- atoms to form distorted corner-sharing SiK4Si4 tetrahedra. All Si–Si bond lengths are 2.42 Å. In the sixth Si+0.17- site, Si+0.17- is bonded in a distorted body-centered cubic geometry to four equivalent K1+ and four equivalent Si+0.17- atoms. In the seventh Si+0.17- site, Si+0.17- is bonded in a 5-coordinate geometry to one K1+ and four Si+0.17- atoms. There are one shorter (2.34 Å) and one longer (2.39 Å) Si–Si bond lengths. In the eighth Si+0.17- site, Si+0.17- is bonded in a 5-coordinate geometry to one K1+ and four Si+0.17- atoms. There are one shorter (2.34 Å) and one longer (2.39 Å) Si–Si bond lengths. In the ninth Si+0.17- site, Si+0.17- is bonded in a 7-coordinate geometry to three K1+ and four Si+0.17- atoms. In the tenth Si+0.17- site, Si+0.17- is bonded in a 7-coordinate geometry to three K1+ and four Si+0.17- atoms. The Si–Si bond length is 2.46 Å.
DOI: 10.17188/1263289
title: Materials Data on CsB9O13 by Materials Project

description: CsB9O13 crystallizes in the tetragonal P4_122 space group. The structure is three-dimensional. Cs is bonded in a 2-coordinate geometry to two equivalent O atoms. Both Cs–O bond lengths are 2.97 Å. There are five inequivalent B sites. In the first B site, B is bonded in a trigonal planar geometry to three O atoms. There are a spread of B–O bond distances ranging from 1.36–1.38 Å. In the second B site, B is bonded in a trigonal planar geometry to three O atoms. There is one shorter (1.34 Å) and two longer (1.40 Å) B–O bond length. In the third B site, B is bonded in a trigonal planar geometry to three O atoms. There is one shorter (1.32 Å) and two longer (1.41 Å) B–O bond length. In the fourth B site, B is bonded in a tetrahedral geometry to four O atoms. There is two shorter (1.46 Å) and two longer (1.48 Å) B–O bond length. In the fifth B site, B is bonded in a bent 120 degrees geometry to two O atoms. There is one shorter (1.33 Å) and one longer (1.43 Å) B–O bond length. There are seven inequivalent O sites. In the first O site, O is bonded in a distorted bent 120 degrees geometry to one Cs and two B atoms. In the second O site, O is bonded in a bent 120 degrees geometry to two equivalent B atoms. In the third O site, O is bonded in a bent 120 degrees geometry to two B atoms. In the fourth O site, O is bonded in a bent 120 degrees geometry to two B atoms. In the fifth O site, O is bonded in a distorted bent 150 degrees geometry to two B atoms. In the sixth O site, O is bonded in a bent 150 degrees geometry to two B atoms. In the seventh O site, O is bonded in a distorted bent 150 degrees geometry to two B atoms.