Materials Data on CrCuO4 by Materials Project
CuCrO4 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. Cr6+ is bonded to four O2- atoms to form CrO4 tetrahedra that share corners with six equivalent CuO6 octahedra. The corner-sharing octahedra tilt angles range from 50–54°. There is two shorter (1.61 Å) and two longer (1.76 Å) Cr–O bond length. Cu2+ is bonded to six O2- atoms to form CuO6 octahedra that share corners with six equivalent CrO4 tetrahedra and edges with two equivalent CuO6 octahedra. There are four shorter (1.98 Å) and two longer (2.38 Å) Cu–O bond lengths. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted trigonal planar geometry to one Cr6+ and two equivalent Cu2+ atoms. In the second O2- site, O2- is bonded in a distorted single-bond geometry to one Cr6+ and one Cu2+ atom.