MgCu2(RhS2)4 crystallizes in the orthorhombic Imm2 space group. Mg(1) is bonded in a 7-coordinate geometry to two equivalent Rh(1), one Cu(1), two equivalent S(1), and two equivalent S(3) atoms. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 7-coordinate geometry to one Mg(1), one S(1), one S(2), two equivalent S(3), and two equivalent S(4) atoms. In the second Rh site, Rh(2) is bonded to one S(3), one S(4), two equivalent S(1), and two equivalent S(2) atoms to form RhS6 octahedra that share corners with three equivalent Cu(2)S4 tetrahedra and edges with two equivalent Rh(2)S6 octahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 5-coordinate geometry to one Mg(1), two equivalent S(1), and two equivalent S(4) atoms. In the second Cu site, Cu(2) is bonded to two equivalent S(2) and two equivalent S(3) atoms to form CuS4 tetrahedra that share corners with six equivalent Rh(2)S6 octahedra. The corner-sharing octahedral tilt angles are 56°. There are four inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to one Mg(1), one Rh(1), two equivalent Rh(2), and one Cu(1) atom. In the second S site, S(2) is bonded to one Rh(1), two equivalent Rh(2), and one Cu(2) atom to form a mixture of distorted corner and edge-sharing SCuRh3 trigonal pyramids. In the third S site, S(3) is bonded in a 5-coordinate geometry to one Mg(1), one Rh(2), two equivalent Rh(1), and one Cu(2) atom. In the fourth S site, S(4) is bonded to one Rh(2), two equivalent Rh(1), and one Cu(1) atom to form a mixture of distorted corner and edge-sharing SCuRh3 tetrahedra.
MgCu2(RhS2)4 crystallizes in the orthorhombic Imm2 space group. Mg(1) is bonded in a 7-coordinate geometry to two equivalent Rh(1), one Cu(1), two equivalent S(1), and two equivalent S(3) atoms. Both Mg(1)-Rh(1) bond lengths are 2.60 Å. The Mg(1)-Cu(1) bond length is 2.58 Å. Both Mg(1)-S(1) bond lengths are 2.32 Å. Both Mg(1)-S(3) bond lengths are 2.45 Å. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded in a 7-coordinate geometry to one Mg(1), one S(1), one S(2), two equivalent S(3), and two equivalent S(4) atoms. The Rh(1)-S(1) bond length is 2.57 Å. The Rh(1)-S(2) bond length is 2.39 Å. Both Rh(1)-S(3) bond lengths are 2.52 Å. Both Rh(1)-S(4) bond lengths are 2.37 Å. In the second Rh site, Rh(2) is bonded to one S(3), one S(4), two equivalent S(1), and two equivalent S(2) atoms to form RhS6 octahedra that share corners with three equivalent Cu(2)S4 tetrahedra and edges with two equivalent Rh(2)S6 octahedra. The Rh(2)-S(3) bond length is 2.44 Å. The Rh(2)-S(4) bond length is 2.38 Å. Both Rh(2)-S(1) bond lengths are 2.38 Å. Both Rh(2)-S(2) bond lengths are 2.40 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 5-coordinate geometry to one Mg(1), two equivalent S(1), and two equivalent S(4) atoms. Both Cu(1)-S(1) bond lengths are 2.83 Å. Both Cu(1)-S(4) bond lengths are 2.19 Å. In the second Cu site, Cu(2) is bonded to two equivalent S(2) and two equivalent S(3) atoms to form CuS4 tetrahedra that share corners with six equivalent Rh(2)S6 octahedra. The corner-sharing octahedral tilt angles are 56°. Both Cu(2)-S(2) bond lengths are 2.42 Å. Both Cu(2)-S(3) bond lengths are 2.38 Å. There are four inequivalent S sites. In the first S site, S(1) is bonded in a 5-coordinate geometry to one Mg(1), one Rh(1), two equivalent Rh(2), and one Cu(1) atom. In the second S site, S(2) is bonded to one Rh(1), two equivalent Rh(2), and one Cu(2) atom to form a mixture of distorted corner and edge-sharing SCuRh3 trigonal pyramids. In the third S site, S(3) is bonded in a 5-coordinate geometry to one Mg(1), one Rh(2), two equivalent Rh(1), and one Cu(2) atom. In the fourth S site, S(4) is bonded to one Rh(2), two equivalent Rh(1), and one Cu(1) atom to form a mixture of distorted corner and edge-sharing SCuRh3 tetrahedra.