Mg2DyMn3S8 is Spinel-derived structured and crystallizes in the trigonal R-3m space group. Mg(1) is bonded to one S(1) and three equivalent S(2) atoms to form MgS4 tetrahedra that share corners with three equivalent Dy(1)S6 octahedra and corners with nine equivalent Mn(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 55-66°. Dy(1) is bonded to six equivalent S(2) atoms to form DyS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra and edges with six equivalent Mn(1)S6 octahedra. Mn(1) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form MnS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Dy(1)S6 octahedra, and edges with four equivalent Mn(1)S6 octahedra. There are two inequivalent S sites. In the first S site, S(1) is bonded to one Mg(1) and three equivalent Mn(1) atoms to form distorted corner-sharing SMgMn3 trigonal pyramids. In the second S site, S(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Dy(1), and two equivalent Mn(1) atoms.
Mg2DyMn3S8 is Spinel-derived structured and crystallizes in the trigonal R-3m space group. Mg(1) is bonded to one S(1) and three equivalent S(2) atoms to form MgS4 tetrahedra that share corners with three equivalent Dy(1)S6 octahedra and corners with nine equivalent Mn(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 55-66°. The Mg(1)-S(1) bond length is 2.48 Å. All Mg(1)-S(2) bond lengths are 2.47 Å. Dy(1) is bonded to six equivalent S(2) atoms to form DyS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra and edges with six equivalent Mn(1)S6 octahedra. All Dy(1)-S(2) bond lengths are 2.70 Å. Mn(1) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form MnS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent Dy(1)S6 octahedra, and edges with four equivalent Mn(1)S6 octahedra. Both Mn(1)-S(1) bond lengths are 2.53 Å. All Mn(1)-S(2) bond lengths are 2.45 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded to one Mg(1) and three equivalent Mn(1) atoms to form distorted corner-sharing SMgMn3 trigonal pyramids. In the second S site, S(2) is bonded in a rectangular see-saw-like geometry to one Mg(1), one Dy(1), and two equivalent Mn(1) atoms.