K3Dy(AsS4)2 crystallizes in the monoclinic C2/c space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to two equivalent S(1), two equivalent S(2), and four equivalent S(4) atoms. In the second K site, K(2) is bonded in a distorted square co-planar geometry to two equivalent S(4) and four equivalent S(3) atoms. In the third K site, K(3) is bonded in a 8-coordinate geometry to four equivalent S(2) and four equivalent S(3) atoms. Dy(1) is bonded in a 8-coordinate geometry to two equivalent S(2), two equivalent S(4), and four equivalent S(1) atoms. As(1) is bonded in a tetrahedral geometry to one S(1), one S(2), one S(3), and one S(4) atom. There are four inequivalent S sites. In the first S site, S(3) is bonded to two equivalent K(2), two equivalent K(3), and one As(1) atom to form a mixture of corner and edge-sharing SK4As square pyramids. In the second S site, S(4) is bonded in a 5-coordinate geometry to one K(2), two equivalent K(1), one Dy(1), and one As(1) atom. In the third S site, S(1) is bonded in a 4-coordinate geometry to one K(1), two equivalent Dy(1), and one As(1) atom. In the fourth S site, S(2) is bonded in a 5-coordinate geometry to one K(1), two equivalent K(3), one Dy(1), and one As(1) atom.
K3Dy(AsS4)2 crystallizes in the monoclinic C2/c space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to two equivalent S(1), two equivalent S(2), and four equivalent S(4) atoms. Both K(1)-S(1) bond lengths are 3.52 Å. Both K(1)-S(2) bond lengths are 3.27 Å. There are two shorter (3.45 Å) and two longer (3.51 Å) K(1)-S(4) bond lengths. In the second K site, K(2) is bonded in a distorted square co-planar geometry to two equivalent S(4) and four equivalent S(3) atoms. Both K(2)-S(4) bond lengths are 3.78 Å. There are two shorter (3.18 Å) and two longer (3.31 Å) K(2)-S(3) bond lengths. In the third K site, K(3) is bonded in a 8-coordinate geometry to four equivalent S(2) and four equivalent S(3) atoms. There are two shorter (3.53 Å) and two longer (3.61 Å) K(3)-S(2) bond lengths. There are two shorter (3.21 Å) and two longer (3.35 Å) K(3)-S(3) bond lengths. Dy(1) is bonded in a 8-coordinate geometry to two equivalent S(2), two equivalent S(4), and four equivalent S(1) atoms. Both Dy(1)-S(2) bond lengths are 2.80 Å. Both Dy(1)-S(4) bond lengths are 2.82 Å. There are two shorter (3.06 Å) and two longer (3.10 Å) Dy(1)-S(1) bond lengths. As(1) is bonded in a tetrahedral geometry to one S(1), one S(2), one S(3), and one S(4) atom. The As(1)-S(1) bond length is 2.20 Å. The As(1)-S(2) bond length is 2.20 Å. The As(1)-S(3) bond length is 2.16 Å. The As(1)-S(4) bond length is 2.20 Å. There are four inequivalent S sites. In the first S site, S(3) is bonded to two equivalent K(2), two equivalent K(3), and one As(1) atom to form a mixture of corner and edge-sharing SK4As square pyramids. In the second S site, S(4) is bonded in a 5-coordinate geometry to one K(2), two equivalent K(1), one Dy(1), and one As(1) atom. In the third S site, S(1) is bonded in a 4-coordinate geometry to one K(1), two equivalent Dy(1), and one As(1) atom. In the fourth S site, S(2) is bonded in a 5-coordinate geometry to one K(1), two equivalent K(3), one Dy(1), and one As(1) atom.