CuSeO5 crystallizes in the orthorhombic P2_12_12_1 space group. Cu(1) is bonded in a square pyramidal geometry to one O(1), one O(2), one O(3), one O(4), and one O(5) atom. Se(1) is bonded in a distorted T-shaped geometry to one O(1), one O(2), and one O(3) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Cu(1) and one Se(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cu(1) and one Se(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Cu(1) and one Se(1) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one Cu(1) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one Cu(1) atom.
CuSeO5 crystallizes in the orthorhombic P2_12_12_1 space group. Cu(1) is bonded in a square pyramidal geometry to one O(1), one O(2), one O(3), one O(4), and one O(5) atom. The Cu(1)-O(1) bond length is 1.89 Å. The Cu(1)-O(2) bond length is 1.89 Å. The Cu(1)-O(3) bond length is 1.88 Å. The Cu(1)-O(4) bond length is 1.78 Å. The Cu(1)-O(5) bond length is 2.06 Å. Se(1) is bonded in a distorted T-shaped geometry to one O(1), one O(2), and one O(3) atom. The Se(1)-O(1) bond length is 1.76 Å. The Se(1)-O(2) bond length is 1.76 Å. The Se(1)-O(3) bond length is 1.77 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Cu(1) and one Se(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cu(1) and one Se(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Cu(1) and one Se(1) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one Cu(1) atom. In the fifth O site, O(5) is bonded in a single-bond geometry to one Cu(1) atom.