Cd3ZnSe4 is Lavarevi\'{c}ite structured and crystallizes in the cubic P-43m space group. Cd(1) is bonded to four equivalent Se(1) atoms to form CdSe4 tetrahedra that share corners with four equivalent Zn(1)Se4 tetrahedra and corners with eight equivalent Cd(1)Se4 tetrahedra. Zn(1) is bonded to four equivalent Se(1) atoms to form ZnSe4 tetrahedra that share corners with twelve equivalent Cd(1)Se4 tetrahedra. Se(1) is bonded to three equivalent Cd(1) and one Zn(1) atom to form corner-sharing SeZnCd3 tetrahedra.
Cd3ZnSe4 is Lavarevi\'{c}ite structured and crystallizes in the cubic P-43m space group. Cd(1) is bonded to four equivalent Se(1) atoms to form CdSe4 tetrahedra that share corners with four equivalent Zn(1)Se4 tetrahedra and corners with eight equivalent Cd(1)Se4 tetrahedra. All Cd(1)-Se(1) bond lengths are 2.65 Å. Zn(1) is bonded to four equivalent Se(1) atoms to form ZnSe4 tetrahedra that share corners with twelve equivalent Cd(1)Se4 tetrahedra. All Zn(1)-Se(1) bond lengths are 2.48 Å. Se(1) is bonded to three equivalent Cd(1) and one Zn(1) atom to form corner-sharing SeZnCd3 tetrahedra.