CuSeO3 crystallizes in the orthorhombic Pbca space group. Cu(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form a mixture of edge and corner-sharing CuO5 trigonal bipyramids. Se(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. There are three inequivalent O sites. In the first O site, O(3) is bonded in a bent 120 degrees geometry to one Cu(1) and one Se(1) atom. In the second O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Cu(1) and one Se(1) atom. In the third 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 Pbca space group. Cu(1) is bonded to one O(3), two equivalent O(1), and two equivalent O(2) atoms to form a mixture of edge and corner-sharing CuO5 trigonal bipyramids. The Cu(1)-O(3) bond length is 1.96 Å. There is one shorter (1.98 Å) and one longer (2.22 Å) Cu(1)-O(1) bond length. There is one shorter (1.98 Å) and one longer (1.99 Å) Cu(1)-O(2) bond length. Se(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. The Se(1)-O(1) bond length is 1.74 Å. The Se(1)-O(2) bond length is 1.74 Å. The Se(1)-O(3) bond length is 1.70 Å. There are three inequivalent O sites. In the first O site, O(3) is bonded in a bent 120 degrees geometry to one Cu(1) and one Se(1) atom. In the second O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Cu(1) and one Se(1) atom. In the third O site, O(2) is bonded in a trigonal planar geometry to two equivalent Cu(1) and one Se(1) atom.