Mg2Lu3MnS8 is Spinel-derived structured and crystallizes in the monoclinic C2/m space group. Mg(1) is bonded to one S(2), one S(3), and two equivalent S(1) atoms to form MgS4 tetrahedra that share corners with three equivalent Lu(2)S6 octahedra, corners with three equivalent Mn(1)S6 octahedra, and corners with six equivalent Lu(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 52-60°. There are two inequivalent Lu sites. In the first Lu site, Lu(1) is bonded to two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms to form LuS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Lu(1)S6 octahedra, edges with two equivalent Lu(2)S6 octahedra, and edges with two equivalent Mn(1)S6 octahedra. In the second Lu site, Lu(2) is bonded to two equivalent S(3) and four equivalent S(1) atoms to form LuS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Mn(1)S6 octahedra, and edges with four equivalent Lu(1)S6 octahedra. Mn(1) is bonded to two equivalent S(2) and four equivalent S(1) atoms to form MnS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Lu(2)S6 octahedra, and edges with four equivalent Lu(1)S6 octahedra. There are three inequivalent S sites. In the first S site, S(1) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Lu(1), one Lu(2), and one Mn(1) atom. In the second S site, S(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), two equivalent Lu(1), and one Mn(1) atom. In the third S site, S(3) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Lu(2), and two equivalent Lu(1) atoms.
Mg2Lu3MnS8 is Spinel-derived structured and crystallizes in the monoclinic C2/m space group. Mg(1) is bonded to one S(2), one S(3), and two equivalent S(1) atoms to form MgS4 tetrahedra that share corners with three equivalent Lu(2)S6 octahedra, corners with three equivalent Mn(1)S6 octahedra, and corners with six equivalent Lu(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 52-60°. The Mg(1)-S(2) bond length is 2.49 Å. The Mg(1)-S(3) bond length is 2.43 Å. Both Mg(1)-S(1) bond lengths are 2.50 Å. There are two inequivalent Lu sites. In the first Lu site, Lu(1) is bonded to two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms to form LuS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Lu(1)S6 octahedra, edges with two equivalent Lu(2)S6 octahedra, and edges with two equivalent Mn(1)S6 octahedra. Both Lu(1)-S(1) bond lengths are 2.68 Å. Both Lu(1)-S(2) bond lengths are 2.67 Å. Both Lu(1)-S(3) bond lengths are 2.65 Å. In the second Lu site, Lu(2) is bonded to two equivalent S(3) and four equivalent S(1) atoms to form LuS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Mn(1)S6 octahedra, and edges with four equivalent Lu(1)S6 octahedra. Both Lu(2)-S(3) bond lengths are 2.65 Å. All Lu(2)-S(1) bond lengths are 2.67 Å. Mn(1) is bonded to two equivalent S(2) and four equivalent S(1) atoms to form MnS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Lu(2)S6 octahedra, and edges with four equivalent Lu(1)S6 octahedra. Both Mn(1)-S(2) bond lengths are 2.55 Å. All Mn(1)-S(1) bond lengths are 2.53 Å. There are three inequivalent S sites. In the first S site, S(1) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Lu(1), one Lu(2), and one Mn(1) atom. In the second S site, S(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), two equivalent Lu(1), and one Mn(1) atom. In the third S site, S(3) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Lu(2), and two equivalent Lu(1) atoms.