SrLuCuS3 crystallizes in the orthorhombic Cmcm space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent S(1) and six equivalent S(2) atoms. Lu(1) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form LuS6 octahedra that share corners with two equivalent Lu(1)S6 octahedra, edges with two equivalent Lu(1)S6 octahedra, and edges with four equivalent Cu(1)S4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. Cu(1) is bonded to two equivalent S(1) and two equivalent S(2) atoms to form CuS4 tetrahedra that share corners with two equivalent Cu(1)S4 tetrahedra and edges with four equivalent Lu(1)S6 octahedra. There are two inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Sr(1), two equivalent Lu(1), and two equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing SSr2Lu2Cu2 octahedra. The corner-sharing octahedra are not tilted. In the second S site, S(2) is bonded in a 6-coordinate geometry to three equivalent Sr(1), two equivalent Lu(1), and one Cu(1) atom.
SrLuCuS3 crystallizes in the orthorhombic Cmcm space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent S(1) and six equivalent S(2) atoms. Both Sr(1)-S(1) bond lengths are 2.99 Å. There are four shorter (3.09 Å) and two longer (3.49 Å) Sr(1)-S(2) bond lengths. Lu(1) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form LuS6 octahedra that share corners with two equivalent Lu(1)S6 octahedra, edges with two equivalent Lu(1)S6 octahedra, and edges with four equivalent Cu(1)S4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. Both Lu(1)-S(1) bond lengths are 2.69 Å. All Lu(1)-S(2) bond lengths are 2.70 Å. Cu(1) is bonded to two equivalent S(1) and two equivalent S(2) atoms to form CuS4 tetrahedra that share corners with two equivalent Cu(1)S4 tetrahedra and edges with four equivalent Lu(1)S6 octahedra. Both Cu(1)-S(1) bond lengths are 2.37 Å. Both Cu(1)-S(2) bond lengths are 2.32 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Sr(1), two equivalent Lu(1), and two equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing SSr2Lu2Cu2 octahedra. The corner-sharing octahedra are not tilted. In the second S site, S(2) is bonded in a 6-coordinate geometry to three equivalent Sr(1), two equivalent Lu(1), and one Cu(1) atom.