Materials Data on LiFeOF by Materials Project

Abstract

LiFeOF is alpha Po-derived structured and crystallizes in the orthorhombic Pmm2 space group. The structure is three-dimensional. Li1+ is bonded to two equivalent O2- and four equivalent F1- atoms to form LiO2F4 octahedra that share corners with six equivalent LiO2F4 octahedra, edges with four equivalent LiO2F4 octahedra, and edges with eight equivalent FeO4F2 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. There are one shorter (2.22 Å) and one longer (2.29 Å) Li–O bond lengths. All Li–F bond lengths are 2.10 Å. Fe2+ is bonded to four equivalent O2- and two equivalent F1- atoms to form FeO4F2 octahedra that share corners with six equivalent FeO4F2 octahedra, edges with four equivalent FeO4F2 octahedra, and edges with eight equivalent LiO2F4 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. All Fe–O bond lengths are 2.10 Å. There are one shorter (2.25 Å) and one longer (2.26 Å) Fe–F bond lengths. O2- is bonded to two equivalent Li1+ and four equivalent Fe2+ atoms to form OLi2Fe4 octahedra that share corners with six equivalent OLi2Fe4 octahedra, edges with four equivalent OLi2Fe4 octahedra, and edges with eight equivalent FLi4Fe2 octahedra. The corner-sharing octahedra tilt angles range from 0–1°. F1- is bonded to four equivalent Li1+ and two equivalent Fe2+ atoms to form FLi4Fe2 octahedra that share corners with six equivalent FLi4Fe2 octahedra, edges with four equivalent FLi4Fe2 octahedra, and edges with eight equivalent OLi2Fe4 octahedra. The corner-sharing octahedra tilt angles range from 0–1°.