Mg2WCr3S8 is Hausmannite-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 W(1)S6 octahedra and corners with nine equivalent Cr(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 58-61°. W(1) is bonded to six equivalent S(2) atoms to form WS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra and edges with six equivalent Cr(1)S6 octahedra. Cr(1) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form CrS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent W(1)S6 octahedra, and edges with four equivalent Cr(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 Cr(1) atoms to form distorted corner-sharing SMgCr3 trigonal pyramids. In the second S site, S(2) is bonded in a 4-coordinate geometry to one Mg(1), one W(1), and two equivalent Cr(1) atoms.
Mg2WCr3S8 is Hausmannite-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 W(1)S6 octahedra and corners with nine equivalent Cr(1)S6 octahedra. The corner-sharing octahedral tilt angles range from 58-61°. The Mg(1)-S(1) bond length is 2.47 Å. All Mg(1)-S(2) bond lengths are 2.46 Å. W(1) is bonded to six equivalent S(2) atoms to form WS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra and edges with six equivalent Cr(1)S6 octahedra. All W(1)-S(2) bond lengths are 2.48 Å. Cr(1) is bonded to two equivalent S(1) and four equivalent S(2) atoms to form CrS6 octahedra that share corners with six equivalent Mg(1)S4 tetrahedra, edges with two equivalent W(1)S6 octahedra, and edges with four equivalent Cr(1)S6 octahedra. Both Cr(1)-S(1) bond lengths are 2.44 Å. All Cr(1)-S(2) bond lengths are 2.44 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded to one Mg(1) and three equivalent Cr(1) atoms to form distorted corner-sharing SMgCr3 trigonal pyramids. In the second S site, S(2) is bonded in a 4-coordinate geometry to one Mg(1), one W(1), and two equivalent Cr(1) atoms.