Mg2La3MnS8 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 La(2)S6 octahedra, corners with three equivalent Mn(1)S6 octahedra, and corners with six equivalent La(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 47-61°. There are two inequivalent La sites. In the first La site, La(1) is bonded to two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms to form LaS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent La(1)S6 octahedra, edges with two equivalent La(2)S6 octahedra, and edges with two equivalent Mn(1)S6 octahedra. In the second La site, La(2) is bonded to two equivalent S(2) and four equivalent S(1) atoms to form LaS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Mn(1)S6 octahedra, and edges with four equivalent La(1)S6 octahedra. Mn(1) is bonded to two equivalent S(3) and four equivalent S(1) atoms to form MnS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent La(2)S6 octahedra, and edges with four equivalent La(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 La(1), one La(2), and one Mn(1) atom. In the second S site, S(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(2), and two equivalent La(1) atoms. In the third S site, S(3) is bonded in a rectangular see-saw-like geometry to one Mg(1), two equivalent La(1), and one Mn(1) atom.
Mg2La3MnS8 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 La(2)S6 octahedra, corners with three equivalent Mn(1)S6 octahedra, and corners with six equivalent La(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 47-61°. The Mg(1)-S(2) bond length is 2.42 Å. The Mg(1)-S(3) bond length is 2.61 Å. Both Mg(1)-S(1) bond lengths are 2.57 Å. There are two inequivalent La sites. In the first La site, La(1) is bonded to two equivalent S(1), two equivalent S(2), and two equivalent S(3) atoms to form LaS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent La(1)S6 octahedra, edges with two equivalent La(2)S6 octahedra, and edges with two equivalent Mn(1)S6 octahedra. Both La(1)-S(1) bond lengths are 2.86 Å. Both La(1)-S(2) bond lengths are 2.82 Å. Both La(1)-S(3) bond lengths are 2.88 Å. In the second La site, La(2) is bonded to two equivalent S(2) and four equivalent S(1) atoms to form LaS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Mn(1)S6 octahedra, and edges with four equivalent La(1)S6 octahedra. Both La(2)-S(2) bond lengths are 2.80 Å. All La(2)-S(1) bond lengths are 2.88 Å. Mn(1) is bonded to two equivalent S(3) and four equivalent S(1) atoms to form MnS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent La(2)S6 octahedra, and edges with four equivalent La(1)S6 octahedra. Both Mn(1)-S(3) bond lengths are 2.56 Å. All Mn(1)-S(1) bond lengths are 2.62 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 La(1), one La(2), and one Mn(1) atom. In the second S site, S(2) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one La(2), and two equivalent La(1) atoms. In the third S site, S(3) is bonded in a rectangular see-saw-like geometry to one Mg(1), two equivalent La(1), and one Mn(1) atom.