K6CoS4 crystallizes in the hexagonal P6_3mc space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one S(2) and four equivalent S(1) atoms. In the second K site, K(2) is bonded in a 4-coordinate geometry to one S(2) and three equivalent S(1) atoms. Co(1) is bonded in a tetrahedral geometry to one S(2) and three equivalent S(1) atoms. There are two inequivalent S sites. In the first S site, S(1) is bonded in a 8-coordinate geometry to three equivalent K(2), four equivalent K(1), and one Co(1) atom. In the second S site, S(2) is bonded in a 7-coordinate geometry to three equivalent K(1), three equivalent K(2), and one Co(1) atom.
K6CoS4 crystallizes in the hexagonal P6_3mc space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one S(2) and four equivalent S(1) atoms. The K(1)-S(2) bond length is 3.32 Å. There are two shorter (3.21 Å) and two longer (3.36 Å) K(1)-S(1) bond lengths. In the second K site, K(2) is bonded in a 4-coordinate geometry to one S(2) and three equivalent S(1) atoms. The K(2)-S(2) bond length is 3.17 Å. There is one shorter (3.12 Å) and two longer (3.18 Å) K(2)-S(1) bond lengths. Co(1) is bonded in a tetrahedral geometry to one S(2) and three equivalent S(1) atoms. The Co(1)-S(2) bond length is 2.37 Å. All Co(1)-S(1) bond lengths are 2.38 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded in a 8-coordinate geometry to three equivalent K(2), four equivalent K(1), and one Co(1) atom. In the second S site, S(2) is bonded in a 7-coordinate geometry to three equivalent K(1), three equivalent K(2), and one Co(1) atom.