Cu2ZnSiTe4 is Stannite structured and crystallizes in the tetragonal I-42m space group. Cu(1) is bonded to four equivalent Te(1) atoms to form CuTe4 tetrahedra that share corners with four equivalent Cu(1)Te4 tetrahedra, corners with four equivalent Zn(1)Te4 tetrahedra, and corners with four equivalent Si(1)Te4 tetrahedra. Zn(1) is bonded to four equivalent Te(1) atoms to form ZnTe4 tetrahedra that share corners with four equivalent Si(1)Te4 tetrahedra and corners with eight equivalent Cu(1)Te4 tetrahedra. Si(1) is bonded to four equivalent Te(1) atoms to form SiTe4 tetrahedra that share corners with four equivalent Zn(1)Te4 tetrahedra and corners with eight equivalent Cu(1)Te4 tetrahedra. Te(1) is bonded to two equivalent Cu(1), one Zn(1), and one Si(1) atom to form corner-sharing TeZnCu2Si tetrahedra.
Cu2ZnSiTe4 is Stannite structured and crystallizes in the tetragonal I-42m space group. Cu(1) is bonded to four equivalent Te(1) atoms to form CuTe4 tetrahedra that share corners with four equivalent Cu(1)Te4 tetrahedra, corners with four equivalent Zn(1)Te4 tetrahedra, and corners with four equivalent Si(1)Te4 tetrahedra. All Cu(1)-Te(1) bond lengths are 2.55 Å. Zn(1) is bonded to four equivalent Te(1) atoms to form ZnTe4 tetrahedra that share corners with four equivalent Si(1)Te4 tetrahedra and corners with eight equivalent Cu(1)Te4 tetrahedra. All Zn(1)-Te(1) bond lengths are 2.67 Å. Si(1) is bonded to four equivalent Te(1) atoms to form SiTe4 tetrahedra that share corners with four equivalent Zn(1)Te4 tetrahedra and corners with eight equivalent Cu(1)Te4 tetrahedra. All Si(1)-Te(1) bond lengths are 2.56 Å. Te(1) is bonded to two equivalent Cu(1), one Zn(1), and one Si(1) atom to form corner-sharing TeZnCu2Si tetrahedra.