K2AuAsS4 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one S(2), four equivalent S(1), and four equivalent S(3) atoms. In the second K site, K(2) is bonded in a 6-coordinate geometry to one S(1), two equivalent S(3), and three equivalent S(2) atoms. Au(1) is bonded in a distorted linear geometry to two equivalent S(3) atoms. As(1) is bonded in a tetrahedral geometry to one S(1), one S(2), and two equivalent S(3) atoms. There are three inequivalent S sites. In the first S site, S(1) is bonded to one K(2), four equivalent K(1), and one As(1) atom to form distorted SK5As octahedra that share corners with four equivalent S(1)K5As octahedra, corners with two equivalent S(2)K4As trigonal bipyramids, edges with four equivalent S(1)K5As octahedra, and edges with three equivalent S(2)K4As trigonal bipyramids. The corner-sharing octahedral tilt angles range from 13-25°. In the second S site, S(2) is bonded to one K(1), three equivalent K(2), and one As(1) atom to form distorted SK4As trigonal bipyramids that share corners with two equivalent S(1)K5As octahedra, corners with two equivalent S(2)K4As trigonal bipyramids, edges with three equivalent S(1)K5As octahedra, and edges with two equivalent S(2)K4As trigonal bipyramids. The corner-sharing octahedral tilt angles range from 10-55°. In the third S site, S(3) is bonded in a 5-coordinate geometry to one K(2), two equivalent K(1), one Au(1), and one As(1) atom.
K2AuAsS4 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 9-coordinate geometry to one S(2), four equivalent S(1), and four equivalent S(3) atoms. The K(1)-S(2) bond length is 3.19 Å. There are a spread of K(1)-S(1) bond distances ranging from 3.31-3.55 Å. There are two shorter (3.37 Å) and two longer (3.52 Å) K(1)-S(3) bond lengths. In the second K site, K(2) is bonded in a 6-coordinate geometry to one S(1), two equivalent S(3), and three equivalent S(2) atoms. The K(2)-S(1) bond length is 3.34 Å. Both K(2)-S(3) bond lengths are 3.43 Å. There is one shorter (3.22 Å) and two longer (3.47 Å) K(2)-S(2) bond lengths. Au(1) is bonded in a distorted linear geometry to two equivalent S(3) atoms. Both Au(1)-S(3) bond lengths are 2.30 Å. As(1) is bonded in a tetrahedral geometry to one S(1), one S(2), and two equivalent S(3) atoms. The As(1)-S(1) bond length is 2.14 Å. The As(1)-S(2) bond length is 2.14 Å. Both As(1)-S(3) bond lengths are 2.21 Å. There are three inequivalent S sites. In the first S site, S(1) is bonded to one K(2), four equivalent K(1), and one As(1) atom to form distorted SK5As octahedra that share corners with four equivalent S(1)K5As octahedra, corners with two equivalent S(2)K4As trigonal bipyramids, edges with four equivalent S(1)K5As octahedra, and edges with three equivalent S(2)K4As trigonal bipyramids. The corner-sharing octahedral tilt angles range from 13-25°. In the second S site, S(2) is bonded to one K(1), three equivalent K(2), and one As(1) atom to form distorted SK4As trigonal bipyramids that share corners with two equivalent S(1)K5As octahedra, corners with two equivalent S(2)K4As trigonal bipyramids, edges with three equivalent S(1)K5As octahedra, and edges with two equivalent S(2)K4As trigonal bipyramids. The corner-sharing octahedral tilt angles range from 10-55°. In the third S site, S(3) is bonded in a 5-coordinate geometry to one K(2), two equivalent K(1), one Au(1), and one As(1) atom.