Tl2SO3 is alpha structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of two Tl2SO3 clusters. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded in a 3-coordinate geometry to one O(1), one O(2), and one O(3) atom. In the second Tl site, Tl(2) is bonded in a 2-coordinate geometry to one O(1) and one O(2) atom. S(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. There are three inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Tl(1), one Tl(2), and one S(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Tl(1), one Tl(2), and one S(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Tl(1) and one S(1) atom.
Tl2SO3 is alpha structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of two Tl2SO3 clusters. There are two inequivalent Tl sites. In the first Tl site, Tl(1) is bonded in a 3-coordinate geometry to one O(1), one O(2), and one O(3) atom. The Tl(1)-O(1) bond length is 2.83 Å. The Tl(1)-O(2) bond length is 2.73 Å. The Tl(1)-O(3) bond length is 2.79 Å. In the second Tl site, Tl(2) is bonded in a 2-coordinate geometry to one O(1) and one O(2) atom. The Tl(2)-O(1) bond length is 2.83 Å. The Tl(2)-O(2) bond length is 2.82 Å. S(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. The S(1)-O(1) bond length is 1.54 Å. The S(1)-O(2) bond length is 1.54 Å. The S(1)-O(3) bond length is 1.55 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one Tl(1), one Tl(2), and one S(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to one Tl(1), one Tl(2), and one S(1) atom. In the third O site, O(3) is bonded in a single-bond geometry to one Tl(1) and one S(1) atom.