Cr4CuGaS8 is Spinel-derived structured and crystallizes in the cubic F-43m space group. Cr(1) is bonded to three equivalent S(1) and three equivalent S(2) atoms to form CrS6 octahedra that share corners with three equivalent Cu(1)S4 tetrahedra, corners with three equivalent Ga(1)S4 tetrahedra, and edges with six equivalent Cr(1)S6 octahedra. Cu(1) is bonded to four equivalent S(1) atoms to form CuS4 tetrahedra that share corners with twelve equivalent Cr(1)S6 octahedra. The corner-sharing octahedral tilt angles are 56°. Ga(1) is bonded to four equivalent S(2) atoms to form GaS4 tetrahedra that share corners with twelve equivalent Cr(1)S6 octahedra. The corner-sharing octahedral tilt angles are 59°. There are two inequivalent S sites. In the first S site, S(1) is bonded in a rectangular see-saw-like geometry to three equivalent Cr(1) and one Cu(1) atom. In the second S site, S(2) is bonded to three equivalent Cr(1) and one Ga(1) atom to form a mixture of distorted edge and corner-sharing SCr3Ga trigonal pyramids.
Cr4CuGaS8 is Spinel-derived structured and crystallizes in the cubic F-43m space group. Cr(1) is bonded to three equivalent S(1) and three equivalent S(2) atoms to form CrS6 octahedra that share corners with three equivalent Cu(1)S4 tetrahedra, corners with three equivalent Ga(1)S4 tetrahedra, and edges with six equivalent Cr(1)S6 octahedra. All Cr(1)-S(1) bond lengths are 2.37 Å. All Cr(1)-S(2) bond lengths are 2.45 Å. Cu(1) is bonded to four equivalent S(1) atoms to form CuS4 tetrahedra that share corners with twelve equivalent Cr(1)S6 octahedra. The corner-sharing octahedral tilt angles are 56°. All Cu(1)-S(1) bond lengths are 2.31 Å. Ga(1) is bonded to four equivalent S(2) atoms to form GaS4 tetrahedra that share corners with twelve equivalent Cr(1)S6 octahedra. The corner-sharing octahedral tilt angles are 59°. All Ga(1)-S(2) bond lengths are 2.33 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded in a rectangular see-saw-like geometry to three equivalent Cr(1) and one Cu(1) atom. In the second S site, S(2) is bonded to three equivalent Cr(1) and one Ga(1) atom to form a mixture of distorted edge and corner-sharing SCr3Ga trigonal pyramids.