CuO crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form corner-sharing CuO6 octahedra. The corner-sharing octahedra are not tilted. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to two equivalent Cu(1) and two equivalent Cu(2) atoms. In the second O site, O(2) is bonded to two equivalent Cu(1) and four equivalent Cu(2) atoms to form corner-sharing OCu6 octahedra. The corner-sharing octahedra are not tilted.
CuO crystallizes in the tetragonal P4/mmm space group. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form corner-sharing CuO6 octahedra. The corner-sharing octahedra are not tilted. Both Cu(1)-O(2) bond lengths are 1.94 Å. All Cu(1)-O(1) bond lengths are 2.08 Å. In the second Cu site, Cu(2) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Cu(2)-O(1) bond lengths are 1.94 Å. Both Cu(2)-O(2) bond lengths are 2.08 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to two equivalent Cu(1) and two equivalent Cu(2) atoms. In the second O site, O(2) is bonded to two equivalent Cu(1) and four equivalent Cu(2) atoms to form corner-sharing OCu6 octahedra. The corner-sharing octahedra are not tilted.