Materials Data on LiCuO2 by Materials Project

Abstract

LiCuO2 is Ilmenite-like structured and crystallizes in the trigonal P3m1 space group. The structure is three-dimensional. Li1+ is bonded to four O2- atoms to form distorted LiO4 trigonal pyramids that share corners with six equivalent CuO6 octahedra, corners with six equivalent LiO4 trigonal pyramids, and edges with three equivalent CuO6 octahedra. The corner-sharing octahedra tilt angles range from 3–60°. There is one shorter (1.89 Å) and three longer (2.00 Å) Li–O bond length. Cu3+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six equivalent LiO4 trigonal pyramids, edges with six equivalent CuO6 octahedra, and edges with three equivalent LiO4 trigonal pyramids. There are three shorter (1.99 Å) and three longer (2.07 Å) Cu–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to three equivalent Li1+ and three equivalent Cu3+ atoms to form OLi3Cu3 octahedra that share corners with six equivalent OLiCu3 trigonal pyramids, edges with six equivalent OLi3Cu3 octahedra, and edges with three equivalent OLiCu3 trigonal pyramids. In the second O2- site, O2- is bonded to one Li1+ and three equivalent Cu3+ atoms to form distorted OLiCu3 trigonal pyramids that share corners with six equivalent OLi3Cu3 octahedra, corners with six equivalent OLiCu3 trigonal pyramids, and edges with three equivalent OLi3Cu3 octahedra. The corner-sharing octahedra tilt angles range from 4–59°.