K2PbGe2S6 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 7-coordinate geometry to two equivalent S(2), two equivalent S(3), and three equivalent S(1) atoms. Pb(1) is bonded in a 6-coordinate geometry to two equivalent S(1) and four equivalent S(3) atoms. Ge(1) is bonded to one S(1), one S(3), and two equivalent S(2) atoms to form edge-sharing GeS4 tetrahedra. There are three inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to three equivalent K(1), one Pb(1), and one Ge(1) atom. In the second S site, S(2) is bonded to two equivalent K(1) and two equivalent Ge(1) atoms to form distorted edge-sharing SK2Ge2 trigonal pyramids. In the third S site, S(3) is bonded in a 1-coordinate geometry to two equivalent K(1), two equivalent Pb(1), and one Ge(1) atom.
K2PbGe2S6 crystallizes in the monoclinic C2/c space group. K(1) is bonded in a 7-coordinate geometry to two equivalent S(2), two equivalent S(3), and three equivalent S(1) atoms. There is one shorter (3.56 Å) and one longer (3.57 Å) K(1)-S(2) bond length. There is one shorter (3.39 Å) and one longer (3.44 Å) K(1)-S(3) bond length. There are a spread of K(1)-S(1) bond distances ranging from 3.32-3.41 Å. Pb(1) is bonded in a 6-coordinate geometry to two equivalent S(1) and four equivalent S(3) atoms. Both Pb(1)-S(1) bond lengths are 3.05 Å. There are two shorter (2.89 Å) and two longer (3.21 Å) Pb(1)-S(3) bond lengths. Ge(1) is bonded to one S(1), one S(3), and two equivalent S(2) atoms to form edge-sharing GeS4 tetrahedra. The Ge(1)-S(1) bond length is 2.19 Å. The Ge(1)-S(3) bond length is 2.20 Å. There is one shorter (2.29 Å) and one longer (2.30 Å) Ge(1)-S(2) bond length. There are three inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to three equivalent K(1), one Pb(1), and one Ge(1) atom. In the second S site, S(2) is bonded to two equivalent K(1) and two equivalent Ge(1) atoms to form distorted edge-sharing SK2Ge2 trigonal pyramids. In the third S site, S(3) is bonded in a 1-coordinate geometry to two equivalent K(1), two equivalent Pb(1), and one Ge(1) atom.