Materials Data on V7(PO4)6 by Materials Project
V7(PO4)6 crystallizes in the triclinic P-1 space group. The structure is three-dimensional. there are four inequivalent V+2.57+ sites. In the first V+2.57+ site, V+2.57+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six PO4 tetrahedra, an edgeedge with one VO6 octahedra, and an edgeedge with one VO5 trigonal bipyramid. There are a spread of V–O bond distances ranging from 1.94–2.15 Å. In the second V+2.57+ site, V+2.57+ is bonded to five O2- atoms to form VO5 trigonal bipyramids that share a cornercorner with one VO6 octahedra, corners with five PO4 tetrahedra, and edges with two VO6 octahedra. The corner-sharing octahedral tilt angles are 67°. There are a spread of V–O bond distances ranging from 2.06–2.12 Å. In the third V+2.57+ site, V+2.57+ is bonded to six O2- atoms to form VO6 octahedra that share a cornercorner with one VO6 octahedra, corners with six PO4 tetrahedra, an edgeedge with one VO6 octahedra, and an edgeedge with one VO5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 62°. There are a spread of V–O bond distances ranging from 2.01–2.18 Å. In the fourth V+2.57+ site, V+2.57+ is bonded to six O2- atoms to form VO6 octahedra that share corners with two equivalent VO6 octahedra, corners with six PO4 tetrahedra, and corners with two equivalent VO5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 62°. There are a spread of V–O bond distances ranging from 2.12–2.30 Å. There are three inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with six VO6 octahedra and a cornercorner with one VO5 trigonal bipyramid. The corner-sharing octahedra tilt angles range from 24–55°. There are a spread of P–O bond distances ranging from 1.50–1.57 Å. In the second P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with five VO6 octahedra and corners with two equivalent VO5 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 32–60°. There are a spread of P–O bond distances ranging from 1.52–1.57 Å. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four VO6 octahedra and corners with two equivalent VO5 trigonal bipyramids. The corner-sharing octahedra tilt angles range from 26–61°. There are a spread of P–O bond distances ranging from 1.51–1.59 Å. There are twelve inequivalent O2- sites. In the first O2- site, O2- is bonded in a bent 150 degrees geometry to one V+2.57+ and one P5+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to two equivalent V+2.57+ and one P5+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one V+2.57+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to two V+2.57+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a trigonal planar geometry to two V+2.57+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to two equivalent V+2.57+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a distorted trigonal planar geometry to two V+2.57+ and one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted trigonal planar geometry to two V+2.57+ and one P5+ atom. In the ninth O2- site, O2- is bonded in a bent 150 degrees geometry to one V+2.57+ and one P5+ atom. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to two V+2.57+ and one P5+ atom. In the eleventh O2- site, O2- is bonded in a bent 150 degrees geometry to one V+2.57+ and one P5+ atom. In the twelfth O2- site, O2- is bonded in a distorted trigonal planar geometry to two V+2.57+ and one P5+ atom.