Mg(MnS2)2 crystallizes in the monoclinic Pm space group. Mg(1) is bonded to one S(1), one S(2), two equivalent S(3), and two equivalent S(4) atoms to form MgS6 octahedra that share corners with four equivalent Mn(1)S6 octahedra, edges with two equivalent Mg(1)S6 octahedra, edges with four equivalent Mn(2)S6 octahedra, and faces with two equivalent Mn(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 48-49°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one S(1), one S(2), two equivalent S(3), and two equivalent S(4) atoms to form distorted MnS6 octahedra that share corners with four equivalent Mg(1)S6 octahedra, corners with eight equivalent Mn(2)S6 octahedra, edges with two equivalent Mn(1)S6 octahedra, and faces with two equivalent Mg(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 47-49°. In the second Mn site, Mn(2) is bonded to one S(3), one S(4), two equivalent S(1), and two equivalent S(2) atoms to form distorted MnS6 octahedra that share corners with eight equivalent Mn(1)S6 octahedra, edges with two equivalent Mn(2)S6 octahedra, and edges with four equivalent Mg(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 47-48°. There are four inequivalent S sites. In the first S site, S(1) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mn(1), and two equivalent Mn(2) atoms. In the second S site, S(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mn(1), and two equivalent Mn(2) atoms. In the third S site, S(3) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Mn(2), and two equivalent Mn(1) atoms. In the fourth S site, S(4) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Mn(2), and two equivalent Mn(1) atoms.
Mg(MnS2)2 crystallizes in the monoclinic Pm space group. Mg(1) is bonded to one S(1), one S(2), two equivalent S(3), and two equivalent S(4) atoms to form MgS6 octahedra that share corners with four equivalent Mn(1)S6 octahedra, edges with two equivalent Mg(1)S6 octahedra, edges with four equivalent Mn(2)S6 octahedra, and faces with two equivalent Mn(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 48-49°. The Mg(1)-S(1) bond length is 2.50 Å. The Mg(1)-S(2) bond length is 2.51 Å. Both Mg(1)-S(3) bond lengths are 2.67 Å. Both Mg(1)-S(4) bond lengths are 2.63 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one S(1), one S(2), two equivalent S(3), and two equivalent S(4) atoms to form distorted MnS6 octahedra that share corners with four equivalent Mg(1)S6 octahedra, corners with eight equivalent Mn(2)S6 octahedra, edges with two equivalent Mn(1)S6 octahedra, and faces with two equivalent Mg(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 47-49°. The Mn(1)-S(1) bond length is 2.77 Å. The Mn(1)-S(2) bond length is 2.72 Å. Both Mn(1)-S(3) bond lengths are 2.39 Å. Both Mn(1)-S(4) bond lengths are 2.37 Å. In the second Mn site, Mn(2) is bonded to one S(3), one S(4), two equivalent S(1), and two equivalent S(2) atoms to form distorted MnS6 octahedra that share corners with eight equivalent Mn(1)S6 octahedra, edges with two equivalent Mn(2)S6 octahedra, and edges with four equivalent Mg(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 47-48°. The Mn(2)-S(3) bond length is 2.66 Å. The Mn(2)-S(4) bond length is 3.15 Å. Both Mn(2)-S(1) bond lengths are 2.34 Å. Both Mn(2)-S(2) bond lengths are 2.34 Å. There are four inequivalent S sites. In the first S site, S(1) is bonded in a distorted rectangular see-saw-like geometry to one Mg(1), one Mn(1), and two equivalent Mn(2) atoms. In the second S site, S(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Mn(1), and two equivalent Mn(2) atoms. In the third S site, S(3) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Mn(2), and two equivalent Mn(1) atoms. In the fourth S site, S(4) is bonded in a 5-coordinate geometry to two equivalent Mg(1), one Mn(2), and two equivalent Mn(1) atoms.