K2S3 crystallizes in the orthorhombic Cmc2_1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one S(2) and six equivalent S(1) atoms. In the second K site, K(2) is bonded in a 8-coordinate geometry to two equivalent S(2) and six equivalent S(1) atoms. There are two inequivalent S sites. In the first S site, S(1) is bonded in a 7-coordinate geometry to three equivalent K(1), three equivalent K(2), and one S(2) atom. In the second S site, S(2) is bonded in a 5-coordinate geometry to one K(1), two equivalent K(2), and two equivalent S(1) atoms.
K2S3 crystallizes in the orthorhombic Cmc2_1 space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 7-coordinate geometry to one S(2) and six equivalent S(1) atoms. The K(1)-S(2) bond length is 3.20 Å. There are four shorter (3.31 Å) and two longer (3.33 Å) K(1)-S(1) bond lengths. In the second K site, K(2) is bonded in a 8-coordinate geometry to two equivalent S(2) and six equivalent S(1) atoms. There is one shorter (3.11 Å) and one longer (3.52 Å) K(2)-S(2) bond length. There are a spread of K(2)-S(1) bond distances ranging from 3.21-3.36 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded in a 7-coordinate geometry to three equivalent K(1), three equivalent K(2), and one S(2) atom. The S(1)-S(2) bond length is 2.09 Å. In the second S site, S(2) is bonded in a 5-coordinate geometry to one K(1), two equivalent K(2), and two equivalent S(1) atoms.