Materials Data on Li2VF6 by Materials Project

Abstract

Li2VF6 is beta Vanadium nitride-derived structured and crystallizes in the monoclinic C2 space group. The structure is three-dimensional. there are four inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to six F1- atoms to form LiF6 octahedra that share corners with four equivalent VF6 octahedra, an edgeedge with one VF6 octahedra, and edges with three LiF6 octahedra. The corner-sharing octahedra tilt angles range from 43–48°. There are a spread of Li–F bond distances ranging from 2.03–2.15 Å. In the second Li1+ site, Li1+ is bonded to six F1- atoms to form LiF6 octahedra that share corners with four equivalent VF6 octahedra, an edgeedge with one VF6 octahedra, and edges with three LiF6 octahedra. The corner-sharing octahedra tilt angles range from 43–48°. There are a spread of Li–F bond distances ranging from 2.03–2.15 Å. In the third Li1+ site, Li1+ is bonded to six F1- atoms to form LiF6 octahedra that share corners with four equivalent VF6 octahedra, an edgeedge with one VF6 octahedra, and edges with three LiF6 octahedra. The corner-sharing octahedra tilt angles range from 44–47°. There are a spread of Li–F bond distances ranging from 2.00–2.14 Å. In the fourth Li1+ site, Li1+ is bonded to six F1- atoms to form LiF6 octahedra that share corners with four equivalent VF6 octahedra, an edgeedge with one VF6 octahedra, and edges with three LiF6 octahedra. The corner-sharing octahedra tilt angles range from 44–47°. There are a spread of Li–F bond distances ranging from 2.00–2.14 Å. There are two inequivalent V4+ sites. In the first V4+ site, V4+ is bonded to six F1- atoms to form VF6 octahedra that share corners with twelve LiF6 octahedra. The corner-sharing octahedra tilt angles range from 43–48°. There are a spread of V–F bond distances ranging from 1.86–1.93 Å. In the second V4+ site, V4+ is bonded to six F1- atoms to form VF6 octahedra that share edges with six LiF6 octahedra. There are a spread of V–F bond distances ranging from 1.87–1.89 Å. There are nine inequivalent F1- sites. In the first F1- site, F1- is bonded in a distorted trigonal non-coplanar geometry to two Li1+ and one V4+ atom. In the second F1- site, F1- is bonded in a 3-coordinate geometry to two Li1+ and one V4+ atom. In the third F1- site, F1- is bonded in a distorted T-shaped geometry to two Li1+ and one V4+ atom. In the fourth F1- site, F1- is bonded in a distorted trigonal non-coplanar geometry to two Li1+ and one V4+ atom. In the fifth F1- site, F1- is bonded in a distorted T-shaped geometry to two Li1+ and one V4+ atom. In the sixth F1- site, F1- is bonded in a distorted T-shaped geometry to two Li1+ and one V4+ atom. In the seventh F1- site, F1- is bonded in a distorted T-shaped geometry to two Li1+ and one V4+ atom. In the eighth F1- site, F1- is bonded in a 3-coordinate geometry to two Li1+ and one V4+ atom. In the ninth F1- site, F1- is bonded in a distorted trigonal non-coplanar geometry to two Li1+ and one V4+ atom.