K2Ag3Sb3S7 crystallizes in the orthorhombic Cmc2_1 space group. K(1) is bonded in a 10-coordinate geometry to one Ag(2), one S(4), four equivalent S(2), and four equivalent S(3) atoms. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent S(1) and two equivalent S(4) atoms. In the second Ag site, Ag(2) is bonded in a 3-coordinate geometry to one K(1), one S(1), one S(3), and one S(4) atom. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a distorted T-shaped geometry to one S(3) and two equivalent S(2) atoms. In the second Sb site, Sb(2) is bonded in a distorted T-shaped geometry to one S(1) and two equivalent S(4) atoms. There are four inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to two equivalent Ag(1), two equivalent Ag(2), and one Sb(2) atom. In the second S site, S(2) is bonded to four equivalent K(1) and two equivalent Sb(1) atoms to form distorted SK4Sb2 octahedra that share corners with four equivalent S(2)K4Sb2 octahedra, corners with six equivalent S(3)K4AgSb octahedra, edges with two equivalent S(2)K4Sb2 octahedra, faces with two equivalent S(2)K4Sb2 octahedra, and faces with four equivalent S(3)K4AgSb octahedra. The corner-sharing octahedral tilt angles range from 39-58°. In the third S site, S(3) is bonded to four equivalent K(1), one Ag(2), and one Sb(1) atom to form distorted SK4AgSb octahedra that share corners with four equivalent S(3)K4AgSb octahedra, corners with six equivalent S(2)K4Sb2 octahedra, edges with four equivalent S(3)K4AgSb octahedra, and faces with four equivalent S(2)K4Sb2 octahedra. The corner-sharing octahedral tilt angles range from 31-58°. In the fourth S site, S(4) is bonded in a 4-coordinate geometry to one K(1), one Ag(1), one Ag(2), and one Sb(2) atom.
K2Ag3Sb3S7 crystallizes in the orthorhombic Cmc2_1 space group. K(1) is bonded in a 10-coordinate geometry to one Ag(2), one S(4), four equivalent S(2), and four equivalent S(3) atoms. The K(1)-Ag(2) bond length is 3.49 Å. The K(1)-S(4) bond length is 3.46 Å. There are a spread of K(1)-S(2) bond distances ranging from 3.28-3.63 Å. There are a spread of K(1)-S(3) bond distances ranging from 3.28-3.63 Å. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent S(1) and two equivalent S(4) atoms. There is one shorter (2.46 Å) and one longer (2.94 Å) Ag(1)-S(1) bond length. Both Ag(1)-S(4) bond lengths are 2.66 Å. In the second Ag site, Ag(2) is bonded in a 3-coordinate geometry to one K(1), one S(1), one S(3), and one S(4) atom. The Ag(2)-S(1) bond length is 2.60 Å. The Ag(2)-S(3) bond length is 2.48 Å. The Ag(2)-S(4) bond length is 2.55 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a distorted T-shaped geometry to one S(3) and two equivalent S(2) atoms. The Sb(1)-S(3) bond length is 2.43 Å. There is one shorter (2.50 Å) and one longer (2.54 Å) Sb(1)-S(2) bond length. In the second Sb site, Sb(2) is bonded in a distorted T-shaped geometry to one S(1) and two equivalent S(4) atoms. The Sb(2)-S(1) bond length is 2.46 Å. Both Sb(2)-S(4) bond lengths are 2.48 Å. There are four inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to two equivalent Ag(1), two equivalent Ag(2), and one Sb(2) atom. In the second S site, S(2) is bonded to four equivalent K(1) and two equivalent Sb(1) atoms to form distorted SK4Sb2 octahedra that share corners with four equivalent S(2)K4Sb2 octahedra, corners with six equivalent S(3)K4AgSb octahedra, edges with two equivalent S(2)K4Sb2 octahedra, faces with two equivalent S(2)K4Sb2 octahedra, and faces with four equivalent S(3)K4AgSb octahedra. The corner-sharing octahedral tilt angles range from 39-58°. In the third S site, S(3) is bonded to four equivalent K(1), one Ag(2), and one Sb(1) atom to form distorted SK4AgSb octahedra that share corners with four equivalent S(3)K4AgSb octahedra, corners with six equivalent S(2)K4Sb2 octahedra, edges with four equivalent S(3)K4AgSb octahedra, and faces with four equivalent S(2)K4Sb2 octahedra. The corner-sharing octahedral tilt angles range from 31-58°. In the fourth S site, S(4) is bonded in a 4-coordinate geometry to one K(1), one Ag(1), one Ag(2), and one Sb(2) atom.