CuSeO3 crystallizes in the orthorhombic Pnma space group. Cu(1) is bonded in a distorted square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Se(1) is bonded in a trigonal non-coplanar geometry to one O(2) and two equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one Se(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Cu(1) and one Se(1) atom.
CuSeO3 crystallizes in the orthorhombic Pnma space group. Cu(1) is bonded in a distorted square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Cu(1)-O(1) bond lengths are 1.93 Å. Both Cu(1)-O(2) bond lengths are 2.09 Å. Se(1) is bonded in a trigonal non-coplanar geometry to one O(2) and two equivalent O(1) atoms. The Se(1)-O(2) bond length is 1.79 Å. Both Se(1)-O(1) bond lengths are 1.74 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one Se(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent Cu(1) and one Se(1) atom.