Materials Data on Cu3As by Materials Project

Abstract

Cu3As crystallizes in the trigonal P-3c1 space group. The structure is three-dimensional. there are three inequivalent Cu1+ sites. In the first Cu1+ site, Cu1+ is bonded to six equivalent As3- atoms to form distorted face-sharing CuAs6 octahedra. All Cu–As bond lengths are 2.85 Å. In the second Cu1+ site, Cu1+ is bonded in a trigonal non-coplanar geometry to three equivalent As3- atoms. All Cu–As bond lengths are 2.55 Å. In the third Cu1+ site, Cu1+ is bonded in a 5-coordinate geometry to one Cu1+ and four equivalent As3- atoms. The Cu–Cu bond length is 2.46 Å. There are a spread of Cu–As bond distances ranging from 2.42–2.96 Å. As3- is bonded in a 12-coordinate geometry to twelve Cu1+ atoms.