LuSeO3Cl crystallizes in the orthorhombic Pnma space group. Lu(1) is bonded to one O(2), four equivalent O(1), and two equivalent Cl(1) atoms to form a mixture of distorted corner and edge-sharing LuCl2O5 pentagonal bipyramids. Se(1) is bonded in a distorted 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 trigonal planar geometry to two equivalent Lu(1) and one Se(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Lu(1) and one Se(1) atom. Cl(1) is bonded in a bent 150 degrees geometry to two equivalent Lu(1) atoms.
LuSeO3Cl crystallizes in the orthorhombic Pnma space group. Lu(1) is bonded to one O(2), four equivalent O(1), and two equivalent Cl(1) atoms to form a mixture of distorted corner and edge-sharing LuCl2O5 pentagonal bipyramids. The Lu(1)-O(2) bond length is 2.15 Å. There are two shorter (2.23 Å) and two longer (2.32 Å) Lu(1)-O(1) bond lengths. There is one shorter (2.69 Å) and one longer (2.74 Å) Lu(1)-Cl(1) bond length. Se(1) is bonded in a distorted trigonal non-coplanar geometry to one O(2) and two equivalent O(1) atoms. The Se(1)-O(2) bond length is 1.70 Å. Both Se(1)-O(1) bond lengths are 1.75 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Lu(1) and one Se(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Lu(1) and one Se(1) atom. Cl(1) is bonded in a bent 150 degrees geometry to two equivalent Lu(1) atoms.