DOI: 10.17188/1292688
title: Materials Data on LiFe2C2O7 by Materials Project

description: LiFe2C2O7 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are two inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share corners with six FeO4 tetrahedra. There are a spread of Li–O bond distances ranging from 2.05–2.38 Å. In the second Li1+ site, Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share corners with six FeO4 tetrahedra. There are a spread of Li–O bond distances ranging from 2.06–2.39 Å. There are four inequivalent Fe+2.50+ sites. In the first Fe+2.50+ site, Fe+2.50+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with three equivalent LiO6 octahedra and a cornercorner with one FeO4 tetrahedra. The corner-sharing octahedral tilt angles are 68°. There are one shorter (1.93 Å) and three longer (2.07 Å) Fe–O bond lengths. In the second Fe+2.50+ site, Fe+2.50+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with three equivalent LiO6 octahedra and a cornercorner with one FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 66–67°. There are a spread of Fe–O bond distances ranging from 1.75–2.01 Å. In the third Fe+2.50+ site, Fe+2.50+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with three equivalent LiO6 octahedra and a cornercorner with one FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 67–69°. There are one shorter (1.94 Å) and three longer (2.07 Å) Fe–O bond lengths. In the fourth Fe+2.50+ site, Fe+2.50+ is bonded to four O2- atoms to form FeO4 tetrahedra that share corners with three equivalent LiO6 octahedra and a cornercorner with one FeO4 tetrahedra. The corner-sharing octahedra tilt angles range from 66–67°. There are a spread of Fe–O bond distances ranging from 1.75–2.01 Å. There are four inequivalent C4+ sites. In the first C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.29 Å) and two longer (1.30 Å) C–O bond length. In the second C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.29 Å) and two longer (1.30 Å) C–O bond length. In the third C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.29 Å) and two longer (1.30 Å) C–O bond length. In the fourth C4+ site, C4+ is bonded in a trigonal planar geometry to three O2- atoms. There is one shorter (1.29 Å) and two longer (1.30 Å) C–O bond length. There are fourteen inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Fe+2.50+, and one C4+ atom. In the second O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Fe+2.50+, and one C4+ atom. In the third O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Fe+2.50+, and one C4+ atom. In the fourth O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Fe+2.50+, and one C4+ atom. In the fifth O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Fe+2.50+, and one C4+ atom. In the sixth O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Fe+2.50+, and one C4+ atom. In the seventh O2- site, O2- is bonded in a linear geometry to two Fe+2.50+ atoms. In the eighth O2- site, O2- is bonded in a linear geometry to two Fe+2.50+ atoms. In the ninth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Fe+2.50+, and one C4+ atom. In the tenth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Fe+2.50+, and one C4+ atom. In the eleventh O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Fe+2.50+, and one C4+ atom. In the twelfth O2- site, O2- is bonded in a distorted trigonal planar geometry to one Li1+, one Fe+2.50+, and one C4+ atom. In the thirteenth O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Fe+2.50+, and one C4+ atom. In the fourteenth O2- site, O2- is bonded in a trigonal planar geometry to one Li1+, one Fe+2.50+, and one C4+ atom.