CdAl2S4 crystallizes in the tetragonal I-4 space group. Cd(1) is bonded to four equivalent S(1) atoms to form CdS4 tetrahedra that share corners with four equivalent Al(1)S4 tetrahedra and corners with four equivalent Al(2)S4 tetrahedra. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to four equivalent S(1) atoms to form AlS4 tetrahedra that share corners with four equivalent Cd(1)S4 tetrahedra and corners with four equivalent Al(2)S4 tetrahedra. In the second Al site, Al(2) is bonded to four equivalent S(1) atoms to form AlS4 tetrahedra that share corners with four equivalent Cd(1)S4 tetrahedra and corners with four equivalent Al(1)S4 tetrahedra. S(1) is bonded in a trigonal non-coplanar geometry to one Cd(1), one Al(1), and one Al(2) atom.
CdAl2S4 crystallizes in the tetragonal I-4 space group. Cd(1) is bonded to four equivalent S(1) atoms to form CdS4 tetrahedra that share corners with four equivalent Al(1)S4 tetrahedra and corners with four equivalent Al(2)S4 tetrahedra. All Cd(1)-S(1) bond lengths are 2.55 Å. There are two inequivalent Al sites. In the first Al site, Al(1) is bonded to four equivalent S(1) atoms to form AlS4 tetrahedra that share corners with four equivalent Cd(1)S4 tetrahedra and corners with four equivalent Al(2)S4 tetrahedra. All Al(1)-S(1) bond lengths are 2.26 Å. In the second Al site, Al(2) is bonded to four equivalent S(1) atoms to form AlS4 tetrahedra that share corners with four equivalent Cd(1)S4 tetrahedra and corners with four equivalent Al(1)S4 tetrahedra. All Al(2)-S(1) bond lengths are 2.26 Å. S(1) is bonded in a trigonal non-coplanar geometry to one Cd(1), one Al(1), and one Al(2) atom.