Materials Data on Li(CuO)2 by Materials Project

Abstract

LiCu2O2 crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. Li1+ is bonded to five O2- atoms to form LiO5 square pyramids that share corners with four equivalent CuO5 square pyramids, edges with four equivalent LiO5 square pyramids, and edges with four equivalent CuO5 square pyramids. There are a spread of Li–O bond distances ranging from 2.08–2.12 Å. There are two inequivalent Cu+1.50+ sites. In the first Cu+1.50+ site, Cu+1.50+ is bonded to five O2- atoms to form distorted CuO5 square pyramids that share corners with four equivalent LiO5 square pyramids, edges with four equivalent LiO5 square pyramids, and edges with four equivalent CuO5 square pyramids. There are a spread of Cu–O bond distances ranging from 1.99–2.64 Å. In the second Cu+1.50+ site, Cu+1.50+ is bonded in a linear geometry to two O2- atoms. There is one shorter (1.86 Å) and one longer (1.88 Å) Cu–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Li1+ and four Cu+1.50+ atoms. In the second O2- site, O2- is bonded to three equivalent Li1+ and three Cu+1.50+ atoms to form edge-sharing OLi3Cu3 octahedra.