CuCd2GaSe4 is Stannite structured and crystallizes in the tetragonal I-42m space group. Cu(1) is bonded to four equivalent Se(1) atoms to form CuSe4 tetrahedra that share corners with four equivalent Ga(1)Se4 tetrahedra and corners with eight equivalent Cd(1)Se4 tetrahedra. Cd(1) is bonded to four equivalent Se(1) atoms to form CdSe4 tetrahedra that share corners with four equivalent Cu(1)Se4 tetrahedra, corners with four equivalent Cd(1)Se4 tetrahedra, and corners with four equivalent Ga(1)Se4 tetrahedra. Ga(1) is bonded to four equivalent Se(1) atoms to form GaSe4 tetrahedra that share corners with four equivalent Cu(1)Se4 tetrahedra and corners with eight equivalent Cd(1)Se4 tetrahedra. Se(1) is bonded to one Cu(1), two equivalent Cd(1), and one Ga(1) atom to form corner-sharing SeCd2GaCu tetrahedra.
CuCd2GaSe4 is Stannite structured and crystallizes in the tetragonal I-42m space group. Cu(1) is bonded to four equivalent Se(1) atoms to form CuSe4 tetrahedra that share corners with four equivalent Ga(1)Se4 tetrahedra and corners with eight equivalent Cd(1)Se4 tetrahedra. All Cu(1)-Se(1) bond lengths are 2.47 Å. Cd(1) is bonded to four equivalent Se(1) atoms to form CdSe4 tetrahedra that share corners with four equivalent Cu(1)Se4 tetrahedra, corners with four equivalent Cd(1)Se4 tetrahedra, and corners with four equivalent Ga(1)Se4 tetrahedra. All Cd(1)-Se(1) bond lengths are 2.67 Å. Ga(1) is bonded to four equivalent Se(1) atoms to form GaSe4 tetrahedra that share corners with four equivalent Cu(1)Se4 tetrahedra and corners with eight equivalent Cd(1)Se4 tetrahedra. All Ga(1)-Se(1) bond lengths are 2.47 Å. Se(1) is bonded to one Cu(1), two equivalent Cd(1), and one Ga(1) atom to form corner-sharing SeCd2GaCu tetrahedra.