CsLaZnTe3 crystallizes in the orthorhombic Cmcm space group. Cs(1) is bonded in a 8-coordinate geometry to two equivalent Te(1) and six equivalent Te(2) atoms. La(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form LaTe6 octahedra that share corners with two equivalent La(1)Te6 octahedra, edges with two equivalent La(1)Te6 octahedra, and edges with four equivalent Zn(1)Te4 tetrahedra. The corner-sharing octahedral tilt angles are 35°. Zn(1) is bonded to two equivalent Te(1) and two equivalent Te(2) atoms to form ZnTe4 tetrahedra that share corners with two equivalent Zn(1)Te4 tetrahedra and edges with four equivalent La(1)Te6 octahedra. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a 6-coordinate geometry to two equivalent Cs(1), two equivalent La(1), and two equivalent Zn(1) atoms. In the second Te site, Te(2) is bonded in a 6-coordinate geometry to three equivalent Cs(1), two equivalent La(1), and one Zn(1) atom.
CsLaZnTe3 crystallizes in the orthorhombic Cmcm space group. Cs(1) is bonded in a 8-coordinate geometry to two equivalent Te(1) and six equivalent Te(2) atoms. Both Cs(1)-Te(1) bond lengths are 3.94 Å. There are four shorter (3.94 Å) and two longer (4.39 Å) Cs(1)-Te(2) bond lengths. La(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form LaTe6 octahedra that share corners with two equivalent La(1)Te6 octahedra, edges with two equivalent La(1)Te6 octahedra, and edges with four equivalent Zn(1)Te4 tetrahedra. The corner-sharing octahedral tilt angles are 35°. Both La(1)-Te(1) bond lengths are 3.22 Å. All La(1)-Te(2) bond lengths are 3.23 Å. Zn(1) is bonded to two equivalent Te(1) and two equivalent Te(2) atoms to form ZnTe4 tetrahedra that share corners with two equivalent Zn(1)Te4 tetrahedra and edges with four equivalent La(1)Te6 octahedra. Both Zn(1)-Te(1) bond lengths are 2.84 Å. Both Zn(1)-Te(2) bond lengths are 2.66 Å. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a 6-coordinate geometry to two equivalent Cs(1), two equivalent La(1), and two equivalent Zn(1) atoms. In the second Te site, Te(2) is bonded in a 6-coordinate geometry to three equivalent Cs(1), two equivalent La(1), and one Zn(1) atom.