Materials Data on Li2VF5 by Materials Project
Li2VF5 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. there are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to four F1- atoms to form distorted LiF4 tetrahedra that share corners with three equivalent VF6 octahedra, a cornercorner with one LiF4 tetrahedra, an edgeedge with one VF6 octahedra, and an edgeedge with one LiF4 tetrahedra. The corner-sharing octahedra tilt angles range from 34–62°. There are a spread of Li–F bond distances ranging from 1.90–2.06 Å. In the second Li1+ site, Li1+ is bonded to four F1- atoms to form LiF4 tetrahedra that share corners with four equivalent VF6 octahedra, a cornercorner with one LiF4 tetrahedra, and an edgeedge with one LiF4 tetrahedra. The corner-sharing octahedra tilt angles range from 29–52°. There are a spread of Li–F bond distances ranging from 1.86–2.01 Å. V3+ is bonded to six F1- atoms to form VF6 octahedra that share corners with seven LiF4 tetrahedra, an edgeedge with one VF6 octahedra, and an edgeedge with one LiF4 tetrahedra. There are a spread of V–F bond distances ranging from 1.90–2.11 Å. There are five inequivalent F1- sites. In the first F1- site, F1- is bonded in a T-shaped geometry to two Li1+ and one V3+ atom. In the second F1- site, F1- is bonded in a 3-coordinate geometry to two Li1+ and one V3+ atom. In the third F1- site, F1- is bonded in a distorted trigonal planar geometry to one Li1+ and two equivalent V3+ atoms. In the fourth F1- site, F1- is bonded in a distorted trigonal planar geometry to two Li1+ and one V3+ atom. In the fifth F1- site, F1- is bonded in a bent 120 degrees geometry to one Li1+ and one V3+ atom.