K2CS3O crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to one S(1), one S(3), two equivalent S(2), and two equivalent O(1) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to two equivalent S(2), three equivalent S(3), and one O(1) atom. C(1) is bonded in a trigonal planar geometry to one S(1), one S(2), and one S(3) atom. There are three inequivalent S sites. In the first S site, S(1) is bonded in a distorted single-bond geometry to one K(1), one C(1), and one O(1) atom. In the second S site, S(2) is bonded to two equivalent K(1), two equivalent K(2), and one C(1) atom to form a mixture of distorted corner and edge-sharing SK4C square pyramids. In the third S site, S(3) is bonded in a 5-coordinate geometry to one K(1), three equivalent K(2), and one C(1) atom. O(1) is bonded in a distorted see-saw-like geometry to one K(2), two equivalent K(1), and one S(1) atom.
K2CS3O crystallizes in the monoclinic P2_1/c space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to one S(1), one S(3), two equivalent S(2), and two equivalent O(1) atoms. The K(1)-S(1) bond length is 3.31 Å. The K(1)-S(3) bond length is 3.39 Å. There is one shorter (3.22 Å) and one longer (3.26 Å) K(1)-S(2) bond length. There is one shorter (2.86 Å) and one longer (2.87 Å) K(1)-O(1) bond length. In the second K site, K(2) is bonded in a 6-coordinate geometry to two equivalent S(2), three equivalent S(3), and one O(1) atom. There is one shorter (3.12 Å) and one longer (3.22 Å) K(2)-S(2) bond length. There are a spread of K(2)-S(3) bond distances ranging from 3.30-3.68 Å. The K(2)-O(1) bond length is 2.79 Å. C(1) is bonded in a trigonal planar geometry to one S(1), one S(2), and one S(3) atom. The C(1)-S(1) bond length is 1.72 Å. The C(1)-S(2) bond length is 1.71 Å. The C(1)-S(3) bond length is 1.73 Å. There are three inequivalent S sites. In the first S site, S(1) is bonded in a distorted single-bond geometry to one K(1), one C(1), and one O(1) atom. The S(1)-O(1) bond length is 1.56 Å. In the second S site, S(2) is bonded to two equivalent K(1), two equivalent K(2), and one C(1) atom to form a mixture of distorted corner and edge-sharing SK4C square pyramids. In the third S site, S(3) is bonded in a 5-coordinate geometry to one K(1), three equivalent K(2), and one C(1) atom. O(1) is bonded in a distorted see-saw-like geometry to one K(2), two equivalent K(1), and one S(1) atom.