SO3 is Indium-like structured and crystallizes in the orthorhombic Pna2_1 space group. The structure is zero-dimensional and consists of four SO3 clusters. There are three inequivalent S sites. In the first S site, S(1) is bonded to one O(1), one O(2), one O(3), and one O(9) atom to form corner-sharing SO4 tetrahedra. In the second S site, S(2) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form corner-sharing SO4 tetrahedra. In the third S site, S(3) is bonded to one O(6), one O(7), one O(8), and one O(9) atom to form corner-sharing SO4 tetrahedra. There are nine inequivalent O sites. In the first O site, O(6) is bonded in a bent 120 degrees geometry to one S(2) and one S(3) atom. In the second O site, O(7) is bonded in a single-bond geometry to one S(3) atom. In the third O site, O(8) is bonded in a single-bond geometry to one S(3) atom. In the fourth O site, O(1) is bonded in a single-bond geometry to one S(1) atom. In the fifth O site, O(9) is bonded in a bent 120 degrees geometry to one S(1) and one S(3) atom. In the sixth O site, O(2) is bonded in a single-bond geometry to one S(1) atom. In the seventh O site, O(3) is bonded in a bent 120 degrees geometry to one S(1) and one S(2) atom. In the eighth O site, O(4) is bonded in a single-bond geometry to one S(2) atom. In the ninth O site, O(5) is bonded in a single-bond geometry to one S(2) atom.
SO3 is Indium-like structured and crystallizes in the orthorhombic Pna2_1 space group. The structure is zero-dimensional and consists of four SO3 clusters. There are three inequivalent S sites. In the first S site, S(1) is bonded to one O(1), one O(2), one O(3), and one O(9) atom to form corner-sharing SO4 tetrahedra. The S(1)-O(1) bond length is 1.40 Å. The S(1)-O(2) bond length is 1.40 Å. The S(1)-O(3) bond length is 1.63 Å. The S(1)-O(9) bond length is 1.62 Å. In the second S site, S(2) is bonded to one O(3), one O(4), one O(5), and one O(6) atom to form corner-sharing SO4 tetrahedra. The S(2)-O(3) bond length is 1.63 Å. The S(2)-O(4) bond length is 1.40 Å. The S(2)-O(5) bond length is 1.40 Å. The S(2)-O(6) bond length is 1.63 Å. In the third S site, S(3) is bonded to one O(6), one O(7), one O(8), and one O(9) atom to form corner-sharing SO4 tetrahedra. The S(3)-O(6) bond length is 1.63 Å. The S(3)-O(7) bond length is 1.40 Å. The S(3)-O(8) bond length is 1.40 Å. The S(3)-O(9) bond length is 1.63 Å. There are nine inequivalent O sites. In the first O site, O(6) is bonded in a bent 120 degrees geometry to one S(2) and one S(3) atom. In the second O site, O(7) is bonded in a single-bond geometry to one S(3) atom. In the third O site, O(8) is bonded in a single-bond geometry to one S(3) atom. In the fourth O site, O(1) is bonded in a single-bond geometry to one S(1) atom. In the fifth O site, O(9) is bonded in a bent 120 degrees geometry to one S(1) and one S(3) atom. In the sixth O site, O(2) is bonded in a single-bond geometry to one S(1) atom. In the seventh O site, O(3) is bonded in a bent 120 degrees geometry to one S(1) and one S(2) atom. In the eighth O site, O(4) is bonded in a single-bond geometry to one S(2) atom. In the ninth O site, O(5) is bonded in a single-bond geometry to one S(2) atom.