Cu2Zn(TeO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(5), one O(6), and one O(7) atom. In the second Cu site, Cu(2) is bonded in a rectangular see-saw-like geometry to one O(2), one O(4), one O(6), and one O(8) atom. Zn(1) is bonded to one O(1), one O(4), one O(7), one O(8), and two equivalent O(3) atoms to form ZnO6 octahedra that share corners with three equivalent Te(1)O4 tetrahedra, corners with three equivalent Te(2)O4 trigonal pyramids, and  an edgeedge with one Zn(1)O6 octahedra. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form TeO4 tetrahedra that share corners with three equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 25-45°. In the second Te site, Te(2) is bonded to one O(3), one O(5), one O(6), and one O(8) atom to form TeO4 trigonal pyramids that share corners with three equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-74°. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a 3-coordinate geometry to one Cu(1), one Zn(1), and one Te(1) atom. In the second O site, O(8) is bonded in a trigonal planar geometry to one Cu(2), one Zn(1), and one Te(2) atom. In the third O site, O(1) is bonded in a distorted trigonal planar geometry to one Cu(1), one Zn(1), and one Te(1) atom. In the fourth O site, O(2) is bonded in a bent 150 degrees geometry to one Cu(2) and one Te(1) atom. In the fifth O site, O(3) is bonded to one Cu(1), two equivalent Zn(1), and one Te(2) atom to form distorted edge-sharing OZn2CuTe tetrahedra. In the sixth O site, O(4) is bonded in a distorted trigonal planar geometry to one Cu(2), one Zn(1), and one Te(1) atom. In the seventh O site, O(5) is bonded in a bent 150 degrees geometry to one Cu(1) and one Te(2) atom. In the eighth O site, O(6) is bonded in a trigonal planar geometry to one Cu(1), one Cu(2), and one Te(2) atom.
Cu2Zn(TeO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(5), one O(6), and one O(7) atom. The Cu(1)-O(1) bond length is 2.01 Å. The Cu(1)-O(3) bond length is 1.95 Å. The Cu(1)-O(5) bond length is 1.95 Å. The Cu(1)-O(6) bond length is 1.93 Å. The Cu(1)-O(7) bond length is 2.59 Å. In the second Cu site, Cu(2) is bonded in a rectangular see-saw-like geometry to one O(2), one O(4), one O(6), and one O(8) atom. The Cu(2)-O(2) bond length is 1.94 Å. The Cu(2)-O(4) bond length is 1.96 Å. The Cu(2)-O(6) bond length is 1.91 Å. The Cu(2)-O(8) bond length is 1.96 Å. Zn(1) is bonded to one O(1), one O(4), one O(7), one O(8), and two equivalent O(3) atoms to form ZnO6 octahedra that share corners with three equivalent Te(1)O4 tetrahedra, corners with three equivalent Te(2)O4 trigonal pyramids, and  an edgeedge with one Zn(1)O6 octahedra. The Zn(1)-O(1) bond length is 2.16 Å. The Zn(1)-O(4) bond length is 2.30 Å. The Zn(1)-O(7) bond length is 2.28 Å. The Zn(1)-O(8) bond length is 2.00 Å. There is one shorter (2.08 Å) and one longer (2.10 Å) Zn(1)-O(3) bond length. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form TeO4 tetrahedra that share corners with three equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 25-45°. The Te(1)-O(1) bond length is 1.90 Å. The Te(1)-O(2) bond length is 1.87 Å. The Te(1)-O(4) bond length is 1.89 Å. The Te(1)-O(7) bond length is 1.85 Å. In the second Te site, Te(2) is bonded to one O(3), one O(5), one O(6), and one O(8) atom to form TeO4 trigonal pyramids that share corners with three equivalent Zn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-74°. The Te(2)-O(3) bond length is 2.16 Å. The Te(2)-O(5) bond length is 1.88 Å. The Te(2)-O(6) bond length is 2.15 Å. The Te(2)-O(8) bond length is 1.95 Å. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a 3-coordinate geometry to one Cu(1), one Zn(1), and one Te(1) atom. In the second O site, O(8) is bonded in a trigonal planar geometry to one Cu(2), one Zn(1), and one Te(2) atom. In the third O site, O(1) is bonded in a distorted trigonal planar geometry to one Cu(1), one Zn(1), and one Te(1) atom. In the fourth O site, O(2) is bonded in a bent 150 degrees geometry to one Cu(2) and one Te(1) atom. In the fifth O site, O(3) is bonded to one Cu(1), two equivalent Zn(1), and one Te(2) atom to form distorted edge-sharing OZn2CuTe tetrahedra. In the sixth O site, O(4) is bonded in a distorted trigonal planar geometry to one Cu(2), one Zn(1), and one Te(1) atom. In the seventh O site, O(5) is bonded in a bent 150 degrees geometry to one Cu(1) and one Te(2) atom. In the eighth O site, O(6) is bonded in a trigonal planar geometry to one Cu(1), one Cu(2), and one Te(2) atom.