Materials Data on VOF by Materials Project

Abstract

VOF is beta Vanadium nitride-derived structured and crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. there are four inequivalent V3+ sites. In the first V3+ site, V3+ is bonded to three O2- and three F1- atoms to form a mixture of edge and corner-sharing VO3F3 octahedra. The corner-sharing octahedra tilt angles range from 47–55°. There are a spread of V–O bond distances ranging from 1.93–2.00 Å. There are two shorter (2.09 Å) and one longer (2.16 Å) V–F bond lengths. In the second V3+ site, V3+ is bonded to four O2- and two F1- atoms to form VO4F2 octahedra that share corners with eight VO3F3 octahedra and edges with two equivalent VO2F4 octahedra. The corner-sharing octahedra tilt angles range from 49–55°. There are a spread of V–O bond distances ranging from 2.00–2.09 Å. Both V–F bond lengths are 2.09 Å. In the third V3+ site, V3+ is bonded to three O2- and three F1- atoms to form a mixture of edge and corner-sharing VO3F3 octahedra. The corner-sharing octahedra tilt angles range from 45–54°. There are a spread of V–O bond distances ranging from 1.92–2.01 Å. There are two shorter (2.09 Å) and one longer (2.18 Å) V–F bond lengths. In the fourth V3+ site, V3+ is bonded to two O2- and four F1- atoms to form VO2F4 octahedra that share corners with eight VO3F3 octahedra and edges with two equivalent VO4F2 octahedra. The corner-sharing octahedra tilt angles range from 45–51°. There is one shorter (1.95 Å) and one longer (1.98 Å) V–O bond length. There are a spread of V–F bond distances ranging from 1.98–2.08 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to three V3+ atoms. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to three V3+ atoms. In the third O2- site, O2- is bonded in a distorted trigonal planar geometry to three V3+ atoms. In the fourth O2- site, O2- is bonded in a distorted trigonal planar geometry to three V3+ atoms. There are four inequivalent F1- sites. In the first F1- site, F1- is bonded in a 3-coordinate geometry to three V3+ atoms. In the second F1- site, F1- is bonded in a distorted trigonal planar geometry to three V3+ atoms. In the third F1- site, F1- is bonded in a distorted trigonal planar geometry to three V3+ atoms. In the fourth F1- site, F1- is bonded in a 3-coordinate geometry to three V3+ atoms.