Materials Data on VO2F by Materials Project
FVO2 crystallizes in the monoclinic Cc space group. The structure is three-dimensional. there are three inequivalent V5+ sites. In the first V5+ site, V5+ is bonded to four O2- and two F1- atoms to form distorted corner-sharing VO4F2 octahedra. The corner-sharing octahedra tilt angles range from 8–42°. There are a spread of V–O bond distances ranging from 1.66–2.10 Å. There are one shorter (2.04 Å) and one longer (2.25 Å) V–F bond lengths. In the second V5+ site, V5+ is bonded to four O2- and two F1- atoms to form distorted corner-sharing VO4F2 octahedra. The corner-sharing octahedra tilt angles range from 9–42°. There are a spread of V–O bond distances ranging from 1.66–2.15 Å. There is one shorter (1.93 Å) and one longer (1.96 Å) V–F bond length. In the third V5+ site, V5+ is bonded to four O2- and two F1- atoms to form distorted corner-sharing VO4F2 octahedra. The corner-sharing octahedra tilt angles range from 8–38°. There are a spread of V–O bond distances ranging from 1.65–2.14 Å. There is one shorter (1.86 Å) and one longer (1.99 Å) V–F bond length. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent V5+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to two V5+ atoms. In the third O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent V5+ atoms. In the fourth O2- site, O2- is bonded in a linear geometry to two V5+ atoms. In the fifth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two V5+ atoms. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to two equivalent V5+ atoms. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted bent 150 degrees geometry to two V5+ atoms. In the second F1- site, F1- is bonded in a linear geometry to two V5+ atoms. In the third F1- site, F1- is bonded in a 2-coordinate geometry to two V5+ atoms.