K2PtS15 crystallizes in the monoclinic Cc 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(14), one S(2), one S(4), one S(6), and two equivalent S(15) atoms. In the second K site, K(2) is bonded in a 7-coordinate geometry to one S(1), one S(12), one S(13), one S(3), one S(5), one S(8), and one S(9) atom. Pt(1) is bonded in an octahedral geometry to one S(11), one S(14), one S(5), one S(6), one S(8), and one S(9) atom. There are fifteen inequivalent S sites. In the first S site, S(11) is bonded in a distorted water-like geometry to one Pt(1) and one S(13) atom. In the second S site, S(12) is bonded in a distorted T-shaped geometry to one K(2), one S(14), and one S(15) atom. In the third S site, S(13) is bonded in a 3-coordinate geometry to one K(2), one S(11), and one S(15) atom. In the fourth S site, S(14) is bonded in a trigonal non-coplanar geometry to one K(1), one Pt(1), and one S(12) atom. In the fifth S site, S(15) is bonded to two equivalent K(1), one S(12), and one S(13) atom to form distorted corner-sharing SK2S2 trigonal pyramids. In the sixth S site, S(1) is bonded in a trigonal non-coplanar geometry to one K(2), one S(2), and one S(6) atom. In the seventh S site, S(2) is bonded in a 3-coordinate geometry to one K(1), one S(1), and one S(7) atom. In the eighth S site, S(3) is bonded in a trigonal non-coplanar geometry to one K(2), one S(10), and one S(4) atom. In the ninth S site, S(4) is bonded in a trigonal planar geometry to one K(1), one S(3), and one S(5) atom. In the tenth S site, S(5) is bonded in a trigonal non-coplanar geometry to one K(2), one Pt(1), and one S(4) atom. In the eleventh S site, S(6) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one Pt(1), and one S(1) atom. In the twelfth S site, S(7) is bonded in a water-like geometry to one S(2) and one S(8) atom. In the thirteenth S site, S(8) is bonded in a distorted trigonal planar geometry to one K(2), one Pt(1), and one S(7) atom. In the fourteenth S site, S(9) is bonded in a distorted trigonal non-coplanar geometry to one K(2), one Pt(1), and one S(10) atom. In the fifteenth S site, S(10) is bonded in a water-like geometry to one S(3) and one S(9) atom.
K2PtS15 crystallizes in the monoclinic Cc 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(14), one S(2), one S(4), one S(6), and two equivalent S(15) atoms. The K(1)-S(14) bond length is 3.30 Å. The K(1)-S(2) bond length is 3.67 Å. The K(1)-S(4) bond length is 3.39 Å. The K(1)-S(6) bond length is 3.24 Å. There is one shorter (3.30 Å) and one longer (3.34 Å) K(1)-S(15) bond length. In the second K site, K(2) is bonded in a 7-coordinate geometry to one S(1), one S(12), one S(13), one S(3), one S(5), one S(8), and one S(9) atom. The K(2)-S(1) bond length is 3.58 Å. The K(2)-S(12) bond length is 3.67 Å. The K(2)-S(13) bond length is 3.49 Å. The K(2)-S(3) bond length is 3.37 Å. The K(2)-S(5) bond length is 3.16 Å. The K(2)-S(8) bond length is 3.30 Å. The K(2)-S(9) bond length is 3.53 Å. Pt(1) is bonded in an octahedral geometry to one S(11), one S(14), one S(5), one S(6), one S(8), and one S(9) atom. The Pt(1)-S(11) bond length is 2.41 Å. The Pt(1)-S(14) bond length is 2.42 Å. The Pt(1)-S(5) bond length is 2.42 Å. The Pt(1)-S(6) bond length is 2.41 Å. The Pt(1)-S(8) bond length is 2.41 Å. The Pt(1)-S(9) bond length is 2.42 Å. There are fifteen inequivalent S sites. In the first S site, S(11) is bonded in a distorted water-like geometry to one Pt(1) and one S(13) atom. The S(11)-S(13) bond length is 2.02 Å. In the second S site, S(12) is bonded in a distorted T-shaped geometry to one K(2), one S(14), and one S(15) atom. The S(12)-S(14) bond length is 2.02 Å. The S(12)-S(15) bond length is 2.09 Å. In the third S site, S(13) is bonded in a 3-coordinate geometry to one K(2), one S(11), and one S(15) atom. The S(13)-S(15) bond length is 2.09 Å. In the fourth S site, S(14) is bonded in a trigonal non-coplanar geometry to one K(1), one Pt(1), and one S(12) atom. In the fifth S site, S(15) is bonded to two equivalent K(1), one S(12), and one S(13) atom to form distorted corner-sharing SK2S2 trigonal pyramids. In the sixth S site, S(1) is bonded in a trigonal non-coplanar geometry to one K(2), one S(2), and one S(6) atom. The S(1)-S(2) bond length is 2.08 Å. The S(1)-S(6) bond length is 2.02 Å. In the seventh S site, S(2) is bonded in a 3-coordinate geometry to one K(1), one S(1), and one S(7) atom. The S(2)-S(7) bond length is 2.06 Å. In the eighth S site, S(3) is bonded in a trigonal non-coplanar geometry to one K(2), one S(10), and one S(4) atom. The S(3)-S(10) bond length is 2.07 Å. The S(3)-S(4) bond length is 2.07 Å. In the ninth S site, S(4) is bonded in a trigonal planar geometry to one K(1), one S(3), and one S(5) atom. The S(4)-S(5) bond length is 2.02 Å. In the tenth S site, S(5) is bonded in a trigonal non-coplanar geometry to one K(2), one Pt(1), and one S(4) atom. In the eleventh S site, S(6) is bonded in a distorted trigonal non-coplanar geometry to one K(1), one Pt(1), and one S(1) atom. In the twelfth S site, S(7) is bonded in a water-like geometry to one S(2) and one S(8) atom. The S(7)-S(8) bond length is 2.02 Å. In the thirteenth S site, S(8) is bonded in a distorted trigonal planar geometry to one K(2), one Pt(1), and one S(7) atom. In the fourteenth S site, S(9) is bonded in a distorted trigonal non-coplanar geometry to one K(2), one Pt(1), and one S(10) atom. The S(9)-S(10) bond length is 2.02 Å. In the fifteenth S site, S(10) is bonded in a water-like geometry to one S(3) and one S(9) atom.