Materials Data on LiMnCoO4 by Materials Project

Abstract

LiCoMnO4 crystallizes in the triclinic P-1 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 MnO6 octahedra, edges with two equivalent LiO6 octahedra, edges with two equivalent MnO6 octahedra, and edges with four CoO6 octahedra. The corner-sharing octahedra tilt angles range from 7–10°. There are a spread of Li–O bond distances ranging from 2.10–2.33 Å. In the second Li1+ site, Li1+ is bonded to six O2- atoms to form LiO6 octahedra that share corners with six equivalent MnO6 octahedra, edges with two equivalent LiO6 octahedra, edges with two equivalent MnO6 octahedra, and edges with four CoO6 octahedra. The corner-sharing octahedra tilt angles range from 8–16°. There are a spread of Li–O bond distances ranging from 2.09–2.12 Å. There are two inequivalent Mn3+ sites. In the first Mn3+ site, Mn3+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with six equivalent LiO6 octahedra, edges with two equivalent LiO6 octahedra, edges with two equivalent MnO6 octahedra, and edges with four CoO6 octahedra. The corner-sharing octahedra tilt angles range from 8–16°. There are a spread of Mn–O bond distances ranging from 1.96–2.22 Å. In the second Mn3+ site, Mn3+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with six equivalent LiO6 octahedra, edges with two equivalent LiO6 octahedra, edges with two equivalent MnO6 octahedra, and edges with four CoO6 octahedra. The corner-sharing octahedra tilt angles range from 7–10°. There is four shorter (1.95 Å) and two longer (1.97 Å) Mn–O bond length. There are two inequivalent Co4+ sites. In the first Co4+ site, Co4+ is bonded to six O2- atoms to form CoO6 octahedra that share edges with two equivalent CoO6 octahedra, edges with four LiO6 octahedra, and edges with four MnO6 octahedra. There are a spread of Co–O bond distances ranging from 1.89–1.91 Å. In the second Co4+ site, Co4+ is bonded to six O2- atoms to form CoO6 octahedra that share edges with two equivalent CoO6 octahedra, edges with four LiO6 octahedra, and edges with four MnO6 octahedra. There are a spread of Co–O bond distances ranging from 1.92–2.10 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Li1+, one Mn3+, and two Co4+ atoms. In the second O2- site, O2- is bonded to two Li1+, two Mn3+, and one Co4+ atom to form a mixture of edge and corner-sharing OLi2Mn2Co square pyramids. In the third O2- site, O2- is bonded in a rectangular see-saw-like geometry to one Li1+, one Mn3+, and two Co4+ atoms. In the fourth O2- site, O2- is bonded to two Li1+, two Mn3+, and one Co4+ atom to form a mixture of edge and corner-sharing OLi2Mn2Co square pyramids.