ZnSeO5 crystallizes in the monoclinic C2/c space group. Zn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form ZnO6 octahedra that share corners with two equivalent Zn(1)O6 octahedra and corners with four equivalent Se(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 46°. Se(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form SeO4 tetrahedra that share corners with four equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-58°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Zn(1) and one Se(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one Se(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to two equivalent Zn(1) atoms.
ZnSeO5 crystallizes in the monoclinic C2/c space group. Zn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form ZnO6 octahedra that share corners with two equivalent Zn(1)O6 octahedra and corners with four equivalent Se(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 46°. Both Zn(1)-O(1) bond lengths are 2.16 Å. Both Zn(1)-O(2) bond lengths are 2.04 Å. Both Zn(1)-O(3) bond lengths are 2.05 Å. Se(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form SeO4 tetrahedra that share corners with four equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 49-58°. Both Se(1)-O(1) bond lengths are 1.69 Å. Both Se(1)-O(2) bond lengths are 1.68 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Zn(1) and one Se(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one Se(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to two equivalent Zn(1) atoms.