DOI: 10.17188/1688311
title: Materials Data on V3(P2O7)2 by Materials Project

description: V3(P2O7)2 crystallizes in the triclinic P-1 space group. The structure is two-dimensional and consists of one V3(P2O7)2 sheet oriented in the (0, 0, 1) direction. there are three inequivalent V+2.67+ sites. In the first V+2.67+ site, V+2.67+ is bonded to six O2- atoms to form distorted VO6 octahedra that share corners with six PO4 tetrahedra and edges with three VO6 octahedra. There are a spread of V–O bond distances ranging from 2.15–2.43 Å. In the second V+2.67+ site, V+2.67+ is bonded to six O2- atoms to form distorted VO6 octahedra that share corners with six PO4 tetrahedra and an edgeedge with one VO6 octahedra. There are a spread of V–O bond distances ranging from 1.88–2.37 Å. In the third V+2.67+ site, V+2.67+ is bonded to six O2- atoms to form VO6 octahedra that share corners with six PO4 tetrahedra and edges with three VO6 octahedra. There are a spread of V–O bond distances ranging from 2.01–2.18 Å. There are four inequivalent P5+ sites. In the first P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with five VO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 35–59°. There are a spread of P–O bond distances ranging from 1.49–1.60 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 a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 22–53°. There are a spread of P–O bond distances ranging from 1.49–1.63 Å. In the third P5+ site, P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with two equivalent VO6 octahedra and a cornercorner with one PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 29–41°. There are a spread of P–O bond distances ranging from 1.46–1.71 Å. In the fourth 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 PO4 tetrahedra. The corner-sharing octahedra tilt angles range from 41–67°. There are a spread of P–O bond distances ranging from 1.53–1.59 Å. There are fourteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to two V+2.67+ and one P5+ atom. In the second O2- site, O2- is bonded in a bent 150 degrees geometry to one V+2.67+ and one P5+ atom. In the third O2- site, O2- is bonded in a bent 150 degrees geometry to one V+2.67+ and one P5+ atom. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to two V+2.67+ and one P5+ atom. In the fifth O2- site, O2- is bonded in a 1-coordinate geometry to two equivalent V+2.67+ and one P5+ atom. In the sixth O2- site, O2- is bonded in a 3-coordinate geometry to two V+2.67+ and one P5+ atom. In the seventh O2- site, O2- is bonded in a single-bond geometry to one P5+ atom. In the eighth O2- site, O2- is bonded in a distorted trigonal planar geometry to two V+2.67+ and one P5+ atom. In the ninth O2- site, O2- is bonded in a bent 150 degrees geometry to two P5+ atoms. In the tenth O2- site, O2- is bonded in a 3-coordinate geometry to two V+2.67+ and one P5+ atom. In the eleventh O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two P5+ atoms. In the twelfth O2- site, O2- is bonded in a 3-coordinate geometry to two V+2.67+ and one P5+ atom. In the thirteenth O2- site, O2- is bonded in a bent 150 degrees geometry to one V+2.67+ and one P5+ atom. In the fourteenth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one V+2.67+ and one P5+ atom.