Materials Data on Li4MnCo3O8 by Materials Project

Abstract

Li4MnCo3O8 is alpha Po-derived structured and crystallizes in the trigonal R-3m 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 equivalent CoO6 octahedra, edges with two equivalent MnO6 octahedra, edges with four equivalent CoO6 octahedra, and edges with six LiO6 octahedra. The corner-sharing octahedra tilt angles range from 6–7°. There are four shorter (2.11 Å) and two longer (2.16 Å) Li–O bond lengths. In the second Li1+ site, Li1+ is bonded to six equivalent O2- atoms to form LiO6 octahedra that share corners with six equivalent MnO6 octahedra, edges with six equivalent LiO6 octahedra, and edges with six equivalent CoO6 octahedra. The corner-sharing octahedral tilt angles are 2°. All Li–O bond lengths are 2.22 Å. Mn2+ is bonded to six equivalent O2- atoms to form MnO6 octahedra that share corners with six equivalent LiO6 octahedra, edges with six equivalent LiO6 octahedra, and edges with six equivalent CoO6 octahedra. The corner-sharing octahedral tilt angles are 2°. All Mn–O bond lengths are 1.95 Å. Co+3.33+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with six equivalent LiO6 octahedra, edges with two equivalent MnO6 octahedra, edges with four equivalent CoO6 octahedra, and edges with six LiO6 octahedra. The corner-sharing octahedra tilt angles range from 6–7°. There are two shorter (2.02 Å) and four longer (2.07 Å) Co–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to three Li1+, one Mn2+, and two equivalent Co+3.33+ atoms to form a mixture of corner and edge-sharing OLi3MnCo2 octahedra. The corner-sharing octahedral tilt angles are 0°. In the second O2- site, O2- is bonded to three equivalent Li1+ and three equivalent Co+3.33+ atoms to form OLi3Co3 octahedra that share corners with six equivalent OLi3Co3 octahedra and edges with twelve equivalent OLi3MnCo2 octahedra. The corner-sharing octahedral tilt angles are 0°.