Dy(CuS)3 crystallizes in the trigonal R-3 space group. Dy(1) is bonded to six equivalent S(1) atoms to form DyS6 octahedra that share corners with twelve equivalent Cu(1)S4 tetrahedra, edges with three equivalent Dy(1)S6 octahedra, and edges with six equivalent Cu(1)S4 tetrahedra. Cu(1) is bonded to four equivalent S(1) atoms to form CuS4 tetrahedra that share corners with four equivalent Dy(1)S6 octahedra, corners with six equivalent Cu(1)S4 tetrahedra, edges with two equivalent Dy(1)S6 octahedra, and edges with three equivalent Cu(1)S4 tetrahedra. The corner-sharing octahedral tilt angles range from 17-55°. S(1) is bonded in a 6-coordinate geometry to two equivalent Dy(1) and four equivalent Cu(1) atoms.
Dy(CuS)3 crystallizes in the trigonal R-3 space group. Dy(1) is bonded to six equivalent S(1) atoms to form DyS6 octahedra that share corners with twelve equivalent Cu(1)S4 tetrahedra, edges with three equivalent Dy(1)S6 octahedra, and edges with six equivalent Cu(1)S4 tetrahedra. All Dy(1)-S(1) bond lengths are 2.74 Å. Cu(1) is bonded to four equivalent S(1) atoms to form CuS4 tetrahedra that share corners with four equivalent Dy(1)S6 octahedra, corners with six equivalent Cu(1)S4 tetrahedra, edges with two equivalent Dy(1)S6 octahedra, and edges with three equivalent Cu(1)S4 tetrahedra. The corner-sharing octahedral tilt angles range from 17-55°. There are a spread of Cu(1)-S(1) bond distances ranging from 2.30-2.40 Å. S(1) is bonded in a 6-coordinate geometry to two equivalent Dy(1) and four equivalent Cu(1) atoms.