Materials Data on Li5Mn3O8 by Materials Project

Abstract

Li5Mn3O8 is Caswellsilverite-like structured and crystallizes in the trigonal R-3m space group. The structure is three-dimensional. there are three 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 four equivalent MnO6 octahedra, and edges with eight LiO6 octahedra. The corner-sharing octahedra tilt angles range from 3–6°. There are two shorter (2.11 Å) and four longer (2.19 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 LiO6 octahedra, edges with six equivalent LiO6 octahedra, and edges with six equivalent MnO6 octahedra. The corner-sharing octahedral tilt angles are 9°. All Li–O bond lengths are 2.08 Å. In the third Li1+ site, Li1+ is bonded to six equivalent O2- atoms to form LiO6 octahedra that share corners with six equivalent LiO6 octahedra, edges with six equivalent LiO6 octahedra, and edges with six equivalent MnO6 octahedra. The corner-sharing octahedral tilt angles are 9°. All Li–O bond lengths are 2.08 Å. Mn+3.67+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with six equivalent LiO6 octahedra, edges with four equivalent MnO6 octahedra, and edges with eight LiO6 octahedra. The corner-sharing octahedra tilt angles range from 3–6°. There is four shorter (1.96 Å) and two longer (2.03 Å) Mn–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to four Li1+ and two equivalent Mn+3.67+ atoms to form a mixture of edge and corner-sharing OLi4Mn2 octahedra. The corner-sharing octahedral tilt angles are 0°. In the second O2- site, O2- is bonded to three equivalent Li1+ and three equivalent Mn+3.67+ atoms to form OLi3Mn3 octahedra that share corners with six equivalent OLi3Mn3 octahedra and edges with twelve equivalent OLi4Mn2 octahedra. The corner-sharing octahedral tilt angles are 0°.