cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17188/1654771
title: Materials Data on Ho4GaSbS9 by Materials Project

description: Ho4GaSbS9 crystallizes in the orthorhombic Aea2 space group. The structure is three-dimensional. there are four inequivalent Ho3+ sites. In the first Ho3+ site, Ho3+ is bonded in a 6-coordinate geometry to six S2- atoms. There are a spread of Ho–S bond distances ranging from 2.72–2.84 Å. In the second Ho3+ site, Ho3+ is bonded in a 6-coordinate geometry to six S2- atoms. There are a spread of Ho–S bond distances ranging from 2.71–2.82 Å. In the third Ho3+ site, Ho3+ is bonded in a 7-coordinate geometry to seven S2- atoms. There are a spread of Ho–S bond distances ranging from 2.70–3.00 Å. In the fourth Ho3+ site, Ho3+ is bonded in a 6-coordinate geometry to six S2- atoms. There are a spread of Ho–S bond distances ranging from 2.69–2.80 Å. Ga3+ is bonded to four S2- atoms to form corner-sharing GaS4 tetrahedra. There are a spread of Ga–S bond distances ranging from 2.29–2.32 Å. Sb3+ is bonded in a rectangular see-saw-like geometry to four S2- atoms. There are a spread of Sb–S bond distances ranging from 2.48–2.85 Å. There are ten inequivalent S2- sites. In the first S2- site, S2- is bonded in a distorted water-like geometry to two equivalent Ga3+ atoms. In the second S2- site, S2- is bonded in a distorted T-shaped geometry to two Ho3+ and one Ga3+ atom. In the third S2- site, S2- is bonded to four Ho3+ atoms to form distorted SHo4 trigonal pyramids that share a cornercorner with one SHo3Ga tetrahedra, corners with four SHo4 trigonal pyramids, an edgeedge with one SHo3Ga tetrahedra, and edges with two SHo4 trigonal pyramids. In the fourth S2- site, S2- is bonded to four Ho3+ atoms to form distorted SHo4 trigonal pyramids that share a cornercorner with one SHo3Ga tetrahedra, corners with four SHo4 trigonal pyramids, an edgeedge with one SHo3Ga tetrahedra, and edges with two SHo4 trigonal pyramids. In the fifth S2- site, S2- is bonded in a rectangular see-saw-like geometry to four Ho3+ atoms. In the sixth S2- site, S2- is bonded in a distorted rectangular see-saw-like geometry to three Ho3+ and one Sb3+ atom. In the seventh S2- site, S2- is bonded to four Ho3+ atoms to form distorted SHo4 trigonal pyramids that share a cornercorner with one SHo3Ga tetrahedra, corners with four SHo4 trigonal pyramids, an edgeedge with one SHo3Ga tetrahedra, and edges with two SHo4 trigonal pyramids. In the eighth S2- site, S2- is bonded in a 3-coordinate geometry to one Ho3+ and two equivalent Sb3+ atoms. In the ninth S2- site, S2- is bonded in a 4-coordinate geometry to two Ho3+, one Ga3+, and one Sb3+ atom. In the tenth S2- site, S2- is bonded to three Ho3+ and one Ga3+ atom to form a mixture of distorted edge and corner-sharing SHo3Ga tetrahedra.
DOI: 10.17188/1654772
title: Materials Data on V2FeO6 by Materials Project

description: Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
DOI: 10.17188/1654774
title: Materials Data on MnGaFeO4 by Materials Project

description: MnFeGaO4 is Spinel-derived structured and crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Mn2+ is bonded to four O2- atoms to form MnO4 tetrahedra that share corners with six equivalent FeO6 octahedra and corners with six equivalent GaO6 octahedra. The corner-sharing octahedra tilt angles range from 58–60°. All Mn–O bond lengths are 2.08 Å. Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with six equivalent MnO4 tetrahedra, edges with two equivalent FeO6 octahedra, and edges with four equivalent GaO6 octahedra. There are four shorter (2.06 Å) and two longer (2.07 Å) Fe–O bond lengths. Ga3+ is bonded to six O2- atoms to form GaO6 octahedra that share corners with six equivalent MnO4 tetrahedra, edges with two equivalent GaO6 octahedra, and edges with four equivalent FeO6 octahedra. There are two shorter (2.03 Å) and four longer (2.04 Å) Ga–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to one Mn2+, two equivalent Fe3+, and one Ga3+ atom to form a mixture of distorted edge and corner-sharing OMnGaFe2 trigonal pyramids. In the second O2- site, O2- is bonded to one Mn2+, one Fe3+, and two equivalent Ga3+ atoms to form a mixture of distorted edge and corner-sharing OMnGa2Fe trigonal pyramids.
DOI: 10.17188/1654775
title: Materials Data on MgMn by Materials Project

description: MgMn is beta-prime cadmium gold structured and crystallizes in the orthorhombic Pmma space group. The structure is three-dimensional. Mg is bonded to eight equivalent Mn atoms to form a mixture of distorted face, edge, and corner-sharing MgMn8 cuboctahedra. There are a spread of Mg–Mn bond distances ranging from 2.81–2.92 Å. Mn is bonded to eight equivalent Mg atoms to form a mixture of distorted face, edge, and corner-sharing MnMg8 cuboctahedra.
DOI: 10.17188/1654776
title: Materials Data on Gd2NiPtO6 by Materials Project

description: Gd2PtNiO6 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Gd3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Gd–O bond distances ranging from 2.28–2.79 Å. Pt4+ is bonded to six O2- atoms to form PtO6 octahedra that share corners with six equivalent NiO6 octahedra. The corner-sharing octahedra tilt angles range from 35–39°. There are two shorter (2.05 Å) and four longer (2.06 Å) Pt–O bond lengths. Ni2+ is bonded to six O2- atoms to form NiO6 octahedra that share corners with six equivalent PtO6 octahedra. The corner-sharing octahedra tilt angles range from 35–39°. There are a spread of Ni–O bond distances ranging from 2.07–2.10 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Gd3+, one Pt4+, and one Ni2+ atom to form distorted corner-sharing OGd2NiPt trigonal pyramids. In the second O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Gd3+, one Pt4+, and one Ni2+ atom. In the third O2- site, O2- is bonded in a 5-coordinate geometry to three equivalent Gd3+, one Pt4+, and one Ni2+ atom.
DOI: 10.17188/1654777
title: Materials Data on ReN2 by Materials Project

description: ReN2 crystallizes in the orthorhombic Immm space group. The structure is three-dimensional. Re6+ is bonded to six N3- atoms to form a mixture of distorted corner and edge-sharing ReN6 octahedra. The corner-sharing octahedral tilt angles are 38°. There are a spread of Re–N bond distances ranging from 1.98–2.24 Å. There are two inequivalent N3- sites. In the first N3- site, N3- is bonded in a 2-coordinate geometry to two equivalent Re6+ and one N3- atom. The N–N bond length is 1.29 Å. In the second N3- site, N3- is bonded in a 4-coordinate geometry to four equivalent Re6+ atoms.
DOI: 10.17188/1654778
title: Materials Data on K9Nd(PS4)4 by Materials Project

description: K9Nd(PS4)4 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are five inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of K–S bond distances ranging from 3.18–3.52 Å. In the second K1+ site, K1+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of K–S bond distances ranging from 3.18–3.52 Å. In the third K1+ site, K1+ is bonded to eight S2- atoms to form distorted KS8 hexagonal bipyramids that share edges with two equivalent NdS8 hexagonal bipyramids and edges with four PS4 tetrahedra. There are a spread of K–S bond distances ranging from 3.24–3.31 Å. In the fourth K1+ site, K1+ is bonded in a 8-coordinate geometry to seven S2- atoms. There are a spread of K–S bond distances ranging from 3.23–3.71 Å. In the fifth K1+ site, K1+ is bonded in a 4-coordinate geometry to seven S2- atoms. There are a spread of K–S bond distances ranging from 3.36–3.76 Å. Nd3+ is bonded to eight S2- atoms to form distorted NdS8 hexagonal bipyramids that share edges with two equivalent KS8 hexagonal bipyramids and edges with four PS4 tetrahedra. There are four shorter (3.00 Å) and four longer (3.02 Å) Nd–S bond lengths. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four S2- atoms to form PS4 tetrahedra that share an edgeedge with one KS8 hexagonal bipyramid and an edgeedge with one NdS8 hexagonal bipyramid. There are two shorter (2.04 Å) and two longer (2.07 Å) P–S bond lengths. In the second P5+ site, P5+ is bonded to four S2- atoms to form PS4 tetrahedra that share an edgeedge with one KS8 hexagonal bipyramid and an edgeedge with one NdS8 hexagonal bipyramid. There are a spread of P–S bond distances ranging from 2.03–2.07 Å. There are eight inequivalent S2- sites. In the first S2- site, S2- is bonded in a 1-coordinate geometry to five K1+ and one P5+ atom. In the second S2- site, S2- is bonded in a 1-coordinate geometry to three K1+, one Nd3+, and one P5+ atom. In the third S2- site, S2- is bonded in a 1-coordinate geometry to five K1+ and one P5+ atom. In the fourth S2- site, S2- is bonded in a 1-coordinate geometry to five K1+ and one P5+ atom. In the fifth S2- site, S2- is bonded in a 1-coordinate geometry to three K1+, one Nd3+, and one P5+ atom. In the sixth S2- site, S2- is bonded in a 1-coordinate geometry to five K1+ and one P5+ atom. In the seventh S2- site, S2- is bonded in a 1-coordinate geometry to four K1+, one Nd3+, and one P5+ atom. In the eighth S2- site, S2- is bonded in a 1-coordinate geometry to four K1+, one Nd3+, and one P5+ atom.
DOI: 10.17188/1654779
title: Materials Data on Eu2Mn2O7 by Materials Project

description: Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
DOI: 10.17188/1654780
title: Materials Data on Ca2SiO5 by Materials Project

description: Ca2SiO5 crystallizes in the orthorhombic Pbca space group. The structure is three-dimensional. there are two inequivalent Ca sites. In the first Ca site, Ca is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Ca–O bond distances ranging from 2.37–2.61 Å. In the second Ca site, Ca is bonded in a 2-coordinate geometry to nine O atoms. There are a spread of Ca–O bond distances ranging from 2.24–3.04 Å. Si is bonded in a tetrahedral geometry to four O atoms. There are a spread of Si–O bond distances ranging from 1.60–1.70 Å. There are five inequivalent O sites. In the first O site, O is bonded in a 2-coordinate geometry to three Ca and one Si atom. In the second O site, O is bonded to three Ca and one Si atom to form distorted corner-sharing OCa3Si trigonal pyramids. In the third O site, O is bonded in a distorted single-bond geometry to two equivalent Ca, one Si, and one O atom. The O–O bond length is 1.52 Å. In the fourth O site, O is bonded in a 3-coordinate geometry to three Ca and one O atom. In the fifth O site, O is bonded in a 5-coordinate geometry to four Ca and one Si atom.
DOI: 10.17188/1654781
title: Materials Data on NbCr3(AgS4)2 by Materials Project

description: Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
DOI: 10.17188/1654782
title: Materials Data on NaCeCuTe4 by Materials Project

description: NaCeCuTe4 crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Na1+ is bonded in a 8-coordinate geometry to eight Te+1.75- atoms. There are four shorter (3.31 Å) and four longer (3.60 Å) Na–Te bond lengths. Ce4+ is bonded in a 9-coordinate geometry to nine Te+1.75- atoms. There are a spread of Ce–Te bond distances ranging from 3.30–3.35 Å. Cu2+ is bonded to four equivalent Te+1.75- atoms to form a mixture of edge and corner-sharing CuTe4 tetrahedra. All Cu–Te bond lengths are 2.72 Å. There are three inequivalent Te+1.75- sites. In the first Te+1.75- site, Te+1.75- is bonded in a 8-coordinate geometry to two equivalent Na1+, two equivalent Ce4+, and four equivalent Te+1.75- atoms. All Te–Te bond lengths are 3.16 Å. In the second Te+1.75- site, Te+1.75- is bonded in a 8-coordinate geometry to four equivalent Na1+ and four equivalent Cu2+ atoms. In the third Te+1.75- site, Te+1.75- is bonded in a 5-coordinate geometry to five equivalent Ce4+ atoms.
DOI: 10.17188/1654783
title: Materials Data on Ti13Al4Si2(SbO14)2 by Materials Project

description: Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
DOI: 10.17188/1654784
title: Materials Data on Ca3As2O19 by Materials Project

description: (Ca3(AsO8)2)2(O2)3 crystallizes in the triclinic P-1 space group. The structure is two-dimensional and consists of two trioxidane molecules and one Ca3(AsO8)2 sheet oriented in the (0, 0, 1) direction. In the Ca3(AsO8)2 sheet, there are three inequivalent Ca sites. In the first Ca site, Ca is bonded in a 8-coordinate geometry to eight O atoms. There are a spread of Ca–O bond distances ranging from 2.24–3.00 Å. In the second Ca site, Ca is bonded to seven O atoms to form distorted CaO7 pentagonal bipyramids that share corners with two equivalent AsO4 tetrahedra and a cornercorner with one AsO4 trigonal pyramid. There are a spread of Ca–O bond distances ranging from 2.30–2.84 Å. In the third Ca site, Ca is bonded in a 6-coordinate geometry to six O atoms. There are a spread of Ca–O bond distances ranging from 2.25–2.57 Å. There are two inequivalent As sites. In the first As site, As is bonded to four O atoms to form distorted AsO4 trigonal pyramids that share a cornercorner with one CaO7 pentagonal bipyramid. There are a spread of As–O bond distances ranging from 1.65–2.07 Å. In the second As site, As is bonded to four O atoms to form AsO4 tetrahedra that share corners with two equivalent CaO7 pentagonal bipyramids. There are a spread of As–O bond distances ranging from 1.70–1.75 Å. There are sixteen inequivalent O sites. In the first O site, O is bonded in a trigonal planar geometry to one Ca, one As, and one O atom. The O–O bond length is 1.31 Å. In the second O site, O is bonded in a 3-coordinate geometry to one Ca, one As, and one O atom. The O–O bond length is 1.42 Å. In the third O site, O is bonded in a single-bond geometry to one As atom. In the fourth O site, O is bonded in a trigonal non-coplanar geometry to two Ca and one As atom. In the fifth O site, O is bonded in a 4-coordinate geometry to three Ca and one As atom. In the sixth O site, O is bonded in a distorted trigonal planar geometry to two Ca and one As atom. In the seventh O site, O is bonded in a distorted bent 150 degrees geometry to one Ca and one As atom. In the eighth O site, O is bonded in a distorted bent 150 degrees geometry to one Ca and one O atom. The O–O bond length is 1.23 Å. In the ninth O site, O is bonded in a distorted T-shaped geometry to two Ca and one O atom. The O–O bond length is 1.33 Å. In the tenth O site, O is bonded in a distorted T-shaped geometry to two Ca and one O atom. The O–O bond length is 1.34 Å. In the eleventh O site, O is bonded in a trigonal non-coplanar geometry to two Ca and one O atom. In the twelfth O site, O is bonded in a bent 120 degrees geometry to two Ca atoms. In the thirteenth O site, O is bonded in a distorted bent 120 degrees geometry to one Ca and one O atom. In the fourteenth O site, O is bonded in a water-like geometry to one Ca and one As atom. In the fifteenth O site, O is bonded in a single-bond geometry to one O atom. In the sixteenth O site, O is bonded in a bent 120 degrees geometry to two O atoms.
DOI: 10.17188/1654786
title: Materials Data on Na4FeO5 by Materials Project

description: Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
DOI: 10.17188/1654787
title: Materials Data on Nb(NCl3)2 by Materials Project

description: NbCl6N2 is Fluorite structured and crystallizes in the cubic Fm-3m space group. The structure is zero-dimensional and consists of eight ammonia molecules and four NbCl6 clusters. In each NbCl6 cluster, Nb4+ is bonded in an octahedral geometry to six equivalent Cl1- atoms. All Nb–Cl bond lengths are 2.37 Å. Cl1- is bonded in a single-bond geometry to one Nb4+ atom.
DOI: 10.17188/1654788
title: Materials Data on HoGePt by Materials Project

description: HoPtGe crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Ho is bonded in a 12-coordinate geometry to six equivalent Pt and six equivalent Ge atoms. There are a spread of Ho–Pt bond distances ranging from 3.02–3.23 Å. There are a spread of Ho–Ge bond distances ranging from 2.99–3.25 Å. Pt is bonded in a 10-coordinate geometry to six equivalent Ho and four equivalent Ge atoms. There are a spread of Pt–Ge bond distances ranging from 2.55–2.77 Å. Ge is bonded in a 10-coordinate geometry to six equivalent Ho and four equivalent Pt atoms.
DOI: 10.17188/1654789
title: Materials Data on Fe3P4PbO14 by Materials Project

description: PbFe3(P2O7)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Fe2+ sites. In the first Fe2+ site, Fe2+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with six PO4 tetrahedra and edges with two FeO6 octahedra. There are a spread of Fe–O bond distances ranging from 2.12–2.30 Å. In the second Fe2+ site, Fe2+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with six PO4 tetrahedra and edges with two equivalent FeO6 octahedra. There are a spread of Fe–O bond distances ranging from 2.14–2.21 Å. Pb2+ is bonded in a distorted body-centered cubic geometry to eight O2- atoms. There are a spread of Pb–O bond distances ranging from 2.64–2.81 Å. There are two inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four FeO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 47–59°. There are a spread of P–O bond distances ranging from 1.52–1.62 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with five FeO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 39–60°. There are a spread of P–O bond distances ranging from 1.53–1.62 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a 1-coordinate geometry to one Fe2+, one Pb2+, and one P5+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent Fe2+ and one P5+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to two Fe2+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one Fe2+, one Pb2+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to one Fe2+, one Pb2+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a 1-coordinate geometry to two Fe2+, one Pb2+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two P5+ atoms.
DOI: 10.17188/1654790
title: Materials Data on LiTi2Zn2(PO5)2 by Materials Project

description: Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
DOI: 10.17188/1654791
title: Materials Data on LiMn2(PO4)3 by Materials Project

description: Computed materials data using density functional theory calculations. These calculations determine the electronic structure of bulk materials by solving approximations to the Schrodinger equation. For more information, see https://materialsproject.org/docs/calculations
DOI: 10.17188/1654793
title: Materials Data on K3Ag9(SbS3)4 by Materials Project

description: K3Ag9(SbS3)4 crystallizes in the tetragonal I-4 space group. The structure is three-dimensional. there are two inequivalent K1+ sites. In the first K1+ site, K1+ is bonded in a body-centered cubic geometry to eight S2- atoms. There are four shorter (3.38 Å) and four longer (3.54 Å) K–S bond lengths. In the second K1+ site, K1+ is bonded in a 8-coordinate geometry to eight S2- atoms. There are a spread of K–S bond distances ranging from 3.33–3.65 Å. There are three inequivalent Ag1+ sites. In the first Ag1+ site, Ag1+ is bonded in a 3-coordinate geometry to four S2- atoms. There are a spread of Ag–S bond distances ranging from 2.51–3.14 Å. In the second Ag1+ site, Ag1+ is bonded in a distorted trigonal planar geometry to four S2- atoms. There are a spread of Ag–S bond distances ranging from 2.53–3.38 Å. In the third Ag1+ site, Ag1+ is bonded in a 4-coordinate geometry to four equivalent S2- atoms. All Ag–S bond lengths are 2.82 Å. Sb3+ is bonded in a distorted trigonal non-coplanar geometry to three S2- atoms. There are a spread of Sb–S bond distances ranging from 2.46–2.49 Å. There are three inequivalent S2- sites. In the first S2- site, S2- is bonded in a 7-coordinate geometry to two K1+, four Ag1+, and one Sb3+ atom. In the second S2- site, S2- is bonded in a 6-coordinate geometry to two K1+, three Ag1+, and one Sb3+ atom. In the third S2- site, S2- is bonded in a 5-coordinate geometry to two equivalent K1+, two Ag1+, and one Sb3+ atom.
DOI: 10.17188/1654794
title: Materials Data on Ta2MnRu by Materials Project

description: Ta2MnRu crystallizes in the orthorhombic Immm space group. The structure is one-dimensional and consists of two Ta2MnRu ribbons oriented in the (1, 0, 0) direction. Ta is bonded in a linear geometry to one Mn and one Ru atom. The Ta–Mn bond length is 2.19 Å. The Ta–Ru bond length is 2.24 Å. Mn is bonded in a linear geometry to two equivalent Ta atoms. Ru is bonded in a linear geometry to two equivalent Ta atoms.
DOI: 10.17188/1654795
title: Materials Data on NbS2 by Materials Project

description: NbS2 is Molybdenite-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is two-dimensional and consists of two NbS2 sheets oriented in the (0, 0, 1) direction. Nb4+ is bonded to six equivalent S2- atoms to form distorted edge-sharing NbS6 pentagonal pyramids. All Nb–S bond lengths are 2.50 Å. S2- is bonded in a distorted T-shaped geometry to three equivalent Nb4+ atoms.
DOI: 10.17188/1654796
title: Materials Data on MgSb by Materials Project

description: MgSb crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. Mg2+ is bonded in a 7-coordinate geometry to seven equivalent Sb2- atoms. There are a spread of Mg–Sb bond distances ranging from 3.01–3.21 Å. Sb2- is bonded in a 7-coordinate geometry to seven equivalent Mg2+ atoms.