Sb2O3 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(3), and two equivalent O(1) atoms. In the second Sb site, Sb(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(2) and two equivalent O(3) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Sb(1) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sb(1) and two equivalent Sb(2) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Sb(1) and two equivalent Sb(2) atoms.
Sb2O3 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(3), and two equivalent O(1) atoms. The Sb(1)-O(2) bond length is 2.54 Å. The Sb(1)-O(3) bond length is 2.03 Å. There is one shorter (1.97 Å) and one longer (2.02 Å) Sb(1)-O(1) bond length. In the second Sb site, Sb(2) is bonded in a distorted rectangular see-saw-like geometry to two equivalent O(2) and two equivalent O(3) atoms. There is one shorter (1.96 Å) and one longer (2.07 Å) Sb(2)-O(2) bond length. There is one shorter (2.01 Å) and one longer (2.36 Å) Sb(2)-O(3) bond length. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to two equivalent Sb(1) atoms. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Sb(1) and two equivalent Sb(2) atoms. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Sb(1) and two equivalent Sb(2) atoms.