CdGa2S2Se2 crystallizes in the monoclinic C2 space group. Cd(1) is bonded to two equivalent Se(1) and two equivalent S(1) atoms to form CdSe2S2 tetrahedra that share corners with four equivalent Ga(1)Se2S2 tetrahedra and corners with four equivalent Ga(2)Se2S2 tetrahedra. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to two equivalent Se(1) and two equivalent S(1) atoms to form GaSe2S2 tetrahedra that share corners with four equivalent Cd(1)Se2S2 tetrahedra and corners with four equivalent Ga(2)Se2S2 tetrahedra. In the second Ga site, Ga(2) is bonded to two equivalent Se(1) and two equivalent S(1) atoms to form GaSe2S2 tetrahedra that share corners with four equivalent Cd(1)Se2S2 tetrahedra and corners with four equivalent Ga(1)Se2S2 tetrahedra. Se(1) is bonded in a trigonal non-coplanar geometry to one Cd(1), one Ga(1), and one Ga(2) atom. S(1) is bonded in a trigonal non-coplanar geometry to one Cd(1), one Ga(1), and one Ga(2) atom.
CdGa2S2Se2 crystallizes in the monoclinic C2 space group. Cd(1) is bonded to two equivalent Se(1) and two equivalent S(1) atoms to form CdSe2S2 tetrahedra that share corners with four equivalent Ga(1)Se2S2 tetrahedra and corners with four equivalent Ga(2)Se2S2 tetrahedra. Both Cd(1)-Se(1) bond lengths are 2.68 Å. Both Cd(1)-S(1) bond lengths are 2.58 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to two equivalent Se(1) and two equivalent S(1) atoms to form GaSe2S2 tetrahedra that share corners with four equivalent Cd(1)Se2S2 tetrahedra and corners with four equivalent Ga(2)Se2S2 tetrahedra. Both Ga(1)-Se(1) bond lengths are 2.44 Å. Both Ga(1)-S(1) bond lengths are 2.32 Å. In the second Ga site, Ga(2) is bonded to two equivalent Se(1) and two equivalent S(1) atoms to form GaSe2S2 tetrahedra that share corners with four equivalent Cd(1)Se2S2 tetrahedra and corners with four equivalent Ga(1)Se2S2 tetrahedra. Both Ga(2)-Se(1) bond lengths are 2.45 Å. Both Ga(2)-S(1) bond lengths are 2.32 Å. Se(1) is bonded in a trigonal non-coplanar geometry to one Cd(1), one Ga(1), and one Ga(2) atom. S(1) is bonded in a trigonal non-coplanar geometry to one Cd(1), one Ga(1), and one Ga(2) atom.