Materials Data on LiFe(Se2O5)2 by Materials Project

Abstract

LiFe(Se2O5)2 crystallizes in the orthorhombic Pnc2 space group. The structure is three-dimensional. Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share edges with two equivalent FeO6 octahedra. There are a spread of Li–O bond distances ranging from 2.15–2.23 Å. Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share edges with two equivalent LiO6 octahedra. There are a spread of Fe–O bond distances ranging from 2.02–2.07 Å. There are two inequivalent Se4+ sites. In the first Se4+ site, Se4+ is bonded in a distorted trigonal non-coplanar geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.68–1.89 Å. In the second Se4+ site, Se4+ is bonded in a 3-coordinate geometry to three O2- atoms. There are a spread of Se–O bond distances ranging from 1.71–1.86 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Li1+ and one Se4+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Fe3+, and one Se4+ atom. In the third O2- site, O2- is bonded in a bent 120 degrees geometry to two equivalent Se4+ atoms. In the fourth O2- site, O2- is bonded in a distorted bent 120 degrees geometry to one Fe3+ and one Se4+ atom. In the fifth O2- site, O2- is bonded in a distorted trigonal non-coplanar geometry to one Li1+, one Fe3+, and one Se4+ atom. In the sixth O2- site, O2- is bonded in a bent 120 degrees geometry to two equivalent Se4+ atoms.