DySm3S4 is Caswellsilverite-like structured and crystallizes in the orthorhombic Pmmm space group. Dy(1) is bonded to two equivalent S(3) and four equivalent S(2) atoms to form DyS6 octahedra that share corners with two equivalent Dy(1)S6 octahedra, corners with four equivalent Sm(2)S6 octahedra, edges with two equivalent Dy(1)S6 octahedra, edges with two equivalent Sm(2)S6 octahedra, and edges with eight equivalent Sm(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms to form SmS6 octahedra that share corners with six equivalent Sm(1)S6 octahedra, edges with four equivalent Dy(1)S6 octahedra, edges with four equivalent Sm(1)S6 octahedra, and edges with four equivalent Sm(2)S6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the second Sm site, Sm(2) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form SmS6 octahedra that share corners with two equivalent Sm(2)S6 octahedra, corners with four equivalent Dy(1)S6 octahedra, edges with two equivalent Dy(1)S6 octahedra, edges with two equivalent Sm(2)S6 octahedra, and edges with eight equivalent Sm(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. There are three inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Sm(2) and four equivalent Sm(1) atoms to form SSm6 octahedra that share corners with two equivalent S(1)Sm6 octahedra, corners with four equivalent S(3)Sm4Dy2 octahedra, edges with two equivalent S(3)Sm4Dy2 octahedra, edges with two equivalent S(1)Sm6 octahedra, and edges with eight equivalent S(2)Sm4Dy2 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second S site, S(2) is bonded to two equivalent Dy(1), two equivalent Sm(1), and two equivalent Sm(2) atoms to form SSm4Dy2 octahedra that share corners with six equivalent S(2)Sm4Dy2 octahedra, edges with four equivalent S(2)Sm4Dy2 octahedra, edges with four equivalent S(3)Sm4Dy2 octahedra, and edges with four equivalent S(1)Sm6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the third S site, S(3) is bonded to two equivalent Dy(1) and four equivalent Sm(1) atoms to form SSm4Dy2 octahedra that share corners with two equivalent S(3)Sm4Dy2 octahedra, corners with four equivalent S(1)Sm6 octahedra, edges with two equivalent S(3)Sm4Dy2 octahedra, edges with two equivalent S(1)Sm6 octahedra, and edges with eight equivalent S(2)Sm4Dy2 octahedra. The corner-sharing octahedral tilt angles range from 0-1°.
DySm3S4 is Caswellsilverite-like structured and crystallizes in the orthorhombic Pmmm space group. Dy(1) is bonded to two equivalent S(3) and four equivalent S(2) atoms to form DyS6 octahedra that share corners with two equivalent Dy(1)S6 octahedra, corners with four equivalent Sm(2)S6 octahedra, edges with two equivalent Dy(1)S6 octahedra, edges with two equivalent Sm(2)S6 octahedra, and edges with eight equivalent Sm(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. Both Dy(1)-S(3) bond lengths are 2.81 Å. All Dy(1)-S(2) bond lengths are 2.76 Å. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded to two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms to form SmS6 octahedra that share corners with six equivalent Sm(1)S6 octahedra, edges with four equivalent Dy(1)S6 octahedra, edges with four equivalent Sm(1)S6 octahedra, and edges with four equivalent Sm(2)S6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. Both Sm(1)-S(1) bond lengths are 2.79 Å. Both Sm(1)-S(2) bond lengths are 2.82 Å. Both Sm(1)-S(3) bond lengths are 2.83 Å. In the second Sm site, Sm(2) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form SmS6 octahedra that share corners with two equivalent Sm(2)S6 octahedra, corners with four equivalent Dy(1)S6 octahedra, edges with two equivalent Dy(1)S6 octahedra, edges with two equivalent Sm(2)S6 octahedra, and edges with eight equivalent Sm(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 0-2°. Both Sm(2)-S(1) bond lengths are 2.81 Å. All Sm(2)-S(2) bond lengths are 2.86 Å. There are three inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Sm(2) and four equivalent Sm(1) atoms to form SSm6 octahedra that share corners with two equivalent S(1)Sm6 octahedra, corners with four equivalent S(3)Sm4Dy2 octahedra, edges with two equivalent S(3)Sm4Dy2 octahedra, edges with two equivalent S(1)Sm6 octahedra, and edges with eight equivalent S(2)Sm4Dy2 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second S site, S(2) is bonded to two equivalent Dy(1), two equivalent Sm(1), and two equivalent Sm(2) atoms to form SSm4Dy2 octahedra that share corners with six equivalent S(2)Sm4Dy2 octahedra, edges with four equivalent S(2)Sm4Dy2 octahedra, edges with four equivalent S(3)Sm4Dy2 octahedra, and edges with four equivalent S(1)Sm6 octahedra. The corner-sharing octahedral tilt angles range from 0-4°. In the third S site, S(3) is bonded to two equivalent Dy(1) and four equivalent Sm(1) atoms to form SSm4Dy2 octahedra that share corners with two equivalent S(3)Sm4Dy2 octahedra, corners with four equivalent S(1)Sm6 octahedra, edges with two equivalent S(3)Sm4Dy2 octahedra, edges with two equivalent S(1)Sm6 octahedra, and edges with eight equivalent S(2)Sm4Dy2 octahedra. The corner-sharing octahedral tilt angles range from 0-1°.