K6Si2S6O crystallizes in the monoclinic P2_1/c space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms. In the third K site, K(3) is bonded in a 6-coordinate geometry to two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms. Si(1) is bonded to one S(1), one S(2), one S(3), and one O(1) atom to form distorted corner-sharing SiS3O tetrahedra. There are three inequivalent S sites. In the first S site, S(1) is bonded in a 1-coordinate geometry to two equivalent K(1), two equivalent K(2), two equivalent K(3), and one Si(1) atom. In the second S site, S(2) is bonded in a 7-coordinate geometry to two equivalent K(1), two equivalent K(2), two equivalent K(3), and one Si(1) atom. In the third S site, S(3) is bonded in a 7-coordinate geometry to two equivalent K(1), two equivalent K(2), two equivalent K(3), and one Si(1) atom. O(1) is bonded in a linear geometry to two equivalent Si(1) atoms.
K6Si2S6O crystallizes in the monoclinic P2_1/c space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 6-coordinate geometry to two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms. There is one shorter (3.20 Å) and one longer (3.60 Å) K(1)-S(1) bond length. There is one shorter (3.13 Å) and one longer (3.18 Å) K(1)-S(2) bond length. There is one shorter (3.11 Å) and one longer (3.20 Å) K(1)-S(3) bond length. In the second K site, K(2) is bonded in a 6-coordinate geometry to two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms. There is one shorter (3.32 Å) and one longer (3.40 Å) K(2)-S(1) bond length. There is one shorter (3.49 Å) and one longer (3.53 Å) K(2)-S(2) bond length. There is one shorter (3.22 Å) and one longer (3.52 Å) K(2)-S(3) bond length. In the third K site, K(3) is bonded in a 6-coordinate geometry to two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms. There is one shorter (3.21 Å) and one longer (3.59 Å) K(3)-S(1) bond length. There is one shorter (3.19 Å) and one longer (3.30 Å) K(3)-S(2) bond length. There is one shorter (3.25 Å) and one longer (3.27 Å) K(3)-S(3) bond length. Si(1) is bonded to one S(1), one S(2), one S(3), and one O(1) atom to form distorted corner-sharing SiS3O tetrahedra. The Si(1)-S(1) bond length is 2.12 Å. The Si(1)-S(2) bond length is 2.12 Å. The Si(1)-S(3) bond length is 2.12 Å. The Si(1)-O(1) bond length is 1.64 Å. There are three inequivalent S sites. In the first S site, S(1) is bonded in a 1-coordinate geometry to two equivalent K(1), two equivalent K(2), two equivalent K(3), and one Si(1) atom. In the second S site, S(2) is bonded in a 7-coordinate geometry to two equivalent K(1), two equivalent K(2), two equivalent K(3), and one Si(1) atom. In the third S site, S(3) is bonded in a 7-coordinate geometry to two equivalent K(1), two equivalent K(2), two equivalent K(3), and one Si(1) atom. O(1) is bonded in a linear geometry to two equivalent Si(1) atoms.