Zn2GeSe4 crystallizes in the tetragonal I-42m space group. Zn(1) is bonded to four equivalent Se(1) atoms to form ZnSe4 tetrahedra that share corners with four equivalent Zn(1)Se4 tetrahedra and corners with four equivalent Ge(1)Se4 tetrahedra. Ge(1) is bonded to four equivalent Se(1) atoms to form GeSe4 tetrahedra that share corners with eight equivalent Zn(1)Se4 tetrahedra. Se(1) is bonded in a trigonal non-coplanar geometry to two equivalent Zn(1) and one Ge(1) atom.
Zn2GeSe4 crystallizes in the tetragonal I-42m space group. Zn(1) is bonded to four equivalent Se(1) atoms to form ZnSe4 tetrahedra that share corners with four equivalent Zn(1)Se4 tetrahedra and corners with four equivalent Ge(1)Se4 tetrahedra. All Zn(1)-Se(1) bond lengths are 2.46 Å. Ge(1) is bonded to four equivalent Se(1) atoms to form GeSe4 tetrahedra that share corners with eight equivalent Zn(1)Se4 tetrahedra. All Ge(1)-Se(1) bond lengths are 2.37 Å. Se(1) is bonded in a trigonal non-coplanar geometry to two equivalent Zn(1) and one Ge(1) atom.