Materials Data on VOF by Materials Project

Abstract

VOF is zeta iron carbide-derived structured and crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two 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 46–57°. There is one shorter (1.94 Å) and two longer (2.00 Å) V–O bond length. There are a spread of V–F bond distances ranging from 2.07–2.17 Å. In the second 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 43–55°. There is one shorter (1.93 Å) and two longer (2.02 Å) V–O bond length. There are a spread of V–F bond distances ranging from 2.04–2.13 Å. There are two 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 3-coordinate geometry to three V3+ atoms. There are two inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted trigonal planar geometry to three V3+ atoms. In the second F1- site, F1- is bonded in a distorted trigonal planar geometry to three V3+ atoms.