DOI: 10.17188/1299355
title: Materials Data on Li2Cr3FeO8 by Materials Project

description: Li2Cr3FeO8 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are four inequivalent Li1+ sites. In the first Li1+ site, Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share corners with two FeO6 octahedra, corners with four CrO6 octahedra, an edgeedge with one FeO6 octahedra, edges with two LiO6 octahedra, and edges with five CrO6 octahedra. The corner-sharing octahedra tilt angles range from 8–19°. There are a spread of Li–O bond distances ranging from 2.11–2.30 Å. In the second Li1+ site, Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share a cornercorner with one FeO6 octahedra, corners with five CrO6 octahedra, edges with two LiO6 octahedra, edges with two equivalent FeO6 octahedra, and edges with four CrO6 octahedra. The corner-sharing octahedra tilt angles range from 8–20°. There are a spread of Li–O bond distances ranging from 2.10–2.26 Å. In the third Li1+ site, Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share a cornercorner with one FeO6 octahedra, corners with five CrO6 octahedra, edges with two LiO6 octahedra, edges with two equivalent FeO6 octahedra, and edges with four CrO6 octahedra. The corner-sharing octahedra tilt angles range from 9–20°. There are a spread of Li–O bond distances ranging from 2.05–2.26 Å. In the fourth Li1+ site, Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share corners with two FeO6 octahedra, corners with four CrO6 octahedra, an edgeedge with one FeO6 octahedra, edges with two LiO6 octahedra, and edges with five CrO6 octahedra. The corner-sharing octahedra tilt angles range from 8–20°. There are a spread of Li–O bond distances ranging from 2.11–2.28 Å. There are six inequivalent Cr+3.67+ sites. In the first Cr+3.67+ site, Cr+3.67+ is bonded to six O2- atoms to form CrO6 octahedra that share corners with three LiO6 octahedra, edges with two FeO6 octahedra, edges with three LiO6 octahedra, and edges with four CrO6 octahedra. The corner-sharing octahedra tilt angles range from 8–19°. There are a spread of Cr–O bond distances ranging from 1.90–2.00 Å. In the second Cr+3.67+ site, Cr+3.67+ is bonded to six O2- atoms to form CrO6 octahedra that share corners with three LiO6 octahedra, edges with two FeO6 octahedra, edges with three LiO6 octahedra, and edges with four CrO6 octahedra. The corner-sharing octahedra tilt angles range from 8–18°. There are a spread of Cr–O bond distances ranging from 1.93–2.01 Å. In the third Cr+3.67+ site, Cr+3.67+ is bonded to six O2- atoms to form CrO6 octahedra that share corners with three LiO6 octahedra, edges with two FeO6 octahedra, edges with three LiO6 octahedra, and edges with four CrO6 octahedra. The corner-sharing octahedra tilt angles range from 8–19°. There are a spread of Cr–O bond distances ranging from 1.89–2.00 Å. In the fourth Cr+3.67+ site, Cr+3.67+ is bonded to six O2- atoms to form CrO6 octahedra that share corners with three LiO6 octahedra, an edgeedge with one FeO6 octahedra, edges with three LiO6 octahedra, and edges with five CrO6 octahedra. The corner-sharing octahedra tilt angles range from 10–20°. There are a spread of Cr–O bond distances ranging from 1.99–2.04 Å. In the fifth Cr+3.67+ site, Cr+3.67+ is bonded to six O2- atoms to form CrO6 octahedra that share corners with three LiO6 octahedra, an edgeedge with one FeO6 octahedra, edges with three LiO6 octahedra, and edges with five CrO6 octahedra. The corner-sharing octahedra tilt angles range from 8–19°. There are a spread of Cr–O bond distances ranging from 1.90–2.02 Å. In the sixth Cr+3.67+ site, Cr+3.67+ is bonded to six O2- atoms to form CrO6 octahedra that share corners with three LiO6 octahedra, edges with two FeO6 octahedra, edges with three LiO6 octahedra, and edges with four CrO6 octahedra. The corner-sharing octahedra tilt angles range from 10–20°. There are a spread of Cr–O bond distances ranging from 1.99–2.05 Å. There are two inequivalent Fe3+ sites. In the first Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with three LiO6 octahedra, an edgeedge with one FeO6 octahedra, edges with three LiO6 octahedra, and edges with five CrO6 octahedra. The corner-sharing octahedra tilt angles range from 11–20°. There are a spread of Fe–O bond distances ranging from 1.96–2.08 Å. In the second Fe3+ site, Fe3+ is bonded to six O2- atoms to form FeO6 octahedra that share corners with three LiO6 octahedra, an edgeedge with one FeO6 octahedra, edges with three LiO6 octahedra, and edges with five CrO6 octahedra. The corner-sharing octahedra tilt angles range from 11–19°. There are a spread of Fe–O bond distances ranging from 1.97–2.08 Å. There are sixteen inequivalent O2- sites. In the first O2- site, O2- is bonded to two Li1+, two Cr+3.67+, and one Fe3+ atom to form OLi2Cr2Fe square pyramids that share corners with two OLi2Cr2Fe square pyramids, corners with three OLiCr2Fe trigonal pyramids, and edges with five OLi2Cr2Fe square pyramids. In the second O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Li1+ and three Cr+3.67+ atoms. In the third O2- site, O2- is bonded to one Li1+, two Cr+3.67+, and one Fe3+ atom to form OLiCr2Fe trigonal pyramids that share corners with seven OLi2Cr2Fe square pyramids, corners with two OLiCrFe2 trigonal pyramids, and edges with three OLi2Cr2Fe square pyramids. In the fourth O2- site, O2- is bonded to two Li1+, two Cr+3.67+, and one Fe3+ atom to form OLi2Cr2Fe square pyramids that share corners with two OLi2Cr2Fe square pyramids, corners with three OLiCrFe2 trigonal pyramids, edges with five OLi2Cr2Fe square pyramids, and an edgeedge with one OLiCr2Fe trigonal pyramid. In the fifth O2- site, O2- is bonded to one Li1+, one Cr+3.67+, and two Fe3+ atoms to form OLiCrFe2 trigonal pyramids that share corners with seven OLi2Cr2Fe square pyramids, a cornercorner with one OLiCr2Fe trigonal pyramid, and edges with three OLi2Cr2Fe square pyramids. In the sixth O2- site, O2- is bonded to two Li1+, two Cr+3.67+, and one Fe3+ atom to form OLi2Cr2Fe square pyramids that share corners with two OLi2Cr2Fe square pyramids, a cornercorner with one OLiCr3 trigonal pyramid, edges with five OLi2Cr2Fe square pyramids, and edges with three OLiCr2Fe trigonal pyramids. In the seventh O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Li1+ and three Cr+3.67+ atoms. In the eighth O2- site, O2- is bonded to two Li1+, two Cr+3.67+, and one Fe3+ atom to form OLi2Cr2Fe square pyramids that share corners with two OLi2Cr2Fe square pyramids, corners with three OLiCr2Fe trigonal pyramids, and edges with five OLi2Cr2Fe square pyramids. In the ninth O2- site, O2- is bonded to two Li1+ and three Cr+3.67+ atoms to form OLi2Cr3 square pyramids that share corners with two OLi2Cr2Fe square pyramids, corners with two OLiCr2Fe trigonal pyramids, edges with five OLi2Cr2Fe square pyramids, and an edgeedge with one OLiCrFe2 trigonal pyramid. In the tenth O2- site, O2- is bonded to two Li1+, two Cr+3.67+, and one Fe3+ atom to form OLi2Cr2Fe square pyramids that share corners with two OLi2Cr2Fe square pyramids, corners with two OLiCr2Fe trigonal pyramids, edges with five OLi2Cr2Fe square pyramids, and edges with two OLiCr2Fe trigonal pyramids. In the eleventh O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Li1+, two Cr+3.67+, and one Fe3+ atom. In the twelfth O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Li1+, one Cr+3.67+, and two Fe3+ atoms. In the thirteenth O2- site, O2- is bonded to one Li1+ and three Cr+3.67+ atoms to form OLiCr3 trigonal pyramids that share corners with seven OLi2Cr2Fe square pyramids, a cornercorner with one OLiCr2Fe trigonal pyramid, and edges with three OLi2Cr2Fe square pyramids. In the fourteenth O2- site, O2- is bonded to two Li1+, two Cr+3.67+, and one Fe3+ atom to form OLi2Cr2Fe square pyramids that share corners with two OLi2Cr2Fe square pyramids, corners with three OLiCr2Fe trigonal pyramids, edges with five OLi2Cr2Fe square pyramids, and edges with two OLiCrFe2 trigonal pyramids. In the fifteenth O2- site, O2- is bonded to two Li1+ and three Cr+3.67+ atoms to form OLi2Cr3 square pyramids that share corners with two OLi2Cr2Fe square pyramids, corners with four OLiCr2Fe trigonal pyramids, and edges with five OLi2Cr2Fe square pyramids. In the sixteenth O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Li1+ and three Cr+3.67+ atoms.