LiCr(FeO2)4 is Spinel-derived structured and crystallizes in the monoclinic C2/m space group. Li(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form LiO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. Cr(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form CrO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Li(1)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form FeO4 tetrahedra that share corners with three equivalent Li(1)O6 octahedra, corners with three equivalent Cr(1)O6 octahedra, and corners with six equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-57°. In the second Fe site, Fe(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form FeO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with two equivalent Fe(2)O6 octahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Cr(1), one Fe(1), and two equivalent Fe(2) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Li(1), one Fe(1), and two equivalent Fe(2) atoms. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Li(1), one Cr(1), one Fe(1), and one Fe(2) atom.
LiCr(FeO2)4 is Spinel-derived structured and crystallizes in the monoclinic C2/m space group. Li(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form LiO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. Both Li(1)-O(2) bond lengths are 2.11 Å. All Li(1)-O(3) bond lengths are 2.11 Å. Cr(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form CrO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Li(1)O6 octahedra, and edges with four equivalent Fe(2)O6 octahedra. Both Cr(1)-O(1) bond lengths are 2.05 Å. All Cr(1)-O(3) bond lengths are 2.03 Å. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form FeO4 tetrahedra that share corners with three equivalent Li(1)O6 octahedra, corners with three equivalent Cr(1)O6 octahedra, and corners with six equivalent Fe(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 56-57°. The Fe(1)-O(1) bond length is 1.98 Å. The Fe(1)-O(2) bond length is 1.91 Å. Both Fe(1)-O(3) bond lengths are 1.91 Å. In the second Fe site, Fe(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form FeO6 octahedra that share corners with six equivalent Fe(1)O4 tetrahedra, edges with two equivalent Li(1)O6 octahedra, edges with two equivalent Cr(1)O6 octahedra, and edges with two equivalent Fe(2)O6 octahedra. Both Fe(2)-O(1) bond lengths are 2.08 Å. Both Fe(2)-O(2) bond lengths are 2.04 Å. Both Fe(2)-O(3) bond lengths are 2.03 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Cr(1), one Fe(1), and two equivalent Fe(2) atoms. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Li(1), one Fe(1), and two equivalent Fe(2) atoms. In the third O site, O(3) is bonded in a rectangular see-saw-like geometry to one Li(1), one Cr(1), one Fe(1), and one Fe(2) atom.