Cu2Zn(WO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form WO4 tetrahedra that share corners with three equivalent Zn(1)O6 octahedra and corners with two equivalent Cu(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 28-46°. In the second W site, W(2) is bonded to one O(3), one O(5), one O(6), and one O(8) atom to form WO4 tetrahedra that share corners with three equivalent Zn(1)O6 octahedra and corners with three equivalent Cu(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 49-61°. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(3), one O(5), one O(6), and one O(7) atom to form distorted CuO5 trigonal bipyramids that share corners with two equivalent W(1)O4 tetrahedra, corners with three equivalent W(2)O4 tetrahedra, and edges with two equivalent Zn(1)O6 octahedra. In the second Cu site, Cu(2) is bonded in a distorted 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 distorted ZnO6 octahedra that share corners with three equivalent W(1)O4 tetrahedra, corners with three equivalent W(2)O4 tetrahedra,  an edgeedge with one Zn(1)O6 octahedra, and edges with two equivalent Cu(1)O5 trigonal bipyramids. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a distorted T-shaped geometry to one W(1), one Cu(1), and one Zn(1) atom. In the second O site, O(8) is bonded in a distorted trigonal planar geometry to one W(2), one Cu(2), and one Zn(1) atom. In the third O site, O(1) is bonded in a trigonal non-coplanar geometry to one W(1), one Cu(1), and one Zn(1) atom. In the fourth O site, O(2) is bonded in a bent 150 degrees geometry to one W(1) and one Cu(2) atom. In the fifth O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one W(2), one Cu(1), and two equivalent Zn(1) atoms. In the sixth O site, O(4) is bonded in a distorted trigonal planar geometry to one W(1), one Cu(2), and one Zn(1) atom. In the seventh O site, O(5) is bonded in a bent 120 degrees geometry to one W(2) and one Cu(1) atom. In the eighth O site, O(6) is bonded in a 3-coordinate geometry to one W(2), one Cu(1), and one Cu(2) atom.
Cu2Zn(WO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent W sites. In the first W site, W(1) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form WO4 tetrahedra that share corners with three equivalent Zn(1)O6 octahedra and corners with two equivalent Cu(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 28-46°. The W(1)-O(1) bond length is 1.86 Å. The W(1)-O(2) bond length is 1.80 Å. The W(1)-O(4) bond length is 1.87 Å. The W(1)-O(7) bond length is 1.82 Å. In the second W site, W(2) is bonded to one O(3), one O(5), one O(6), and one O(8) atom to form WO4 tetrahedra that share corners with three equivalent Zn(1)O6 octahedra and corners with three equivalent Cu(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 49-61°. The W(2)-O(3) bond length is 1.86 Å. The W(2)-O(5) bond length is 1.80 Å. The W(2)-O(6) bond length is 1.82 Å. The W(2)-O(8) bond length is 1.84 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to one O(1), one O(3), one O(5), one O(6), and one O(7) atom to form distorted CuO5 trigonal bipyramids that share corners with two equivalent W(1)O4 tetrahedra, corners with three equivalent W(2)O4 tetrahedra, and edges with two equivalent Zn(1)O6 octahedra. The Cu(1)-O(1) bond length is 1.97 Å. The Cu(1)-O(3) bond length is 2.46 Å. The Cu(1)-O(5) bond length is 1.93 Å. The Cu(1)-O(6) bond length is 2.14 Å. The Cu(1)-O(7) bond length is 2.40 Å. In the second Cu site, Cu(2) is bonded in a distorted 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 1.90 Å. The Cu(2)-O(4) bond length is 1.96 Å. The Cu(2)-O(6) bond length is 2.37 Å. The Cu(2)-O(8) bond length is 2.23 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 distorted ZnO6 octahedra that share corners with three equivalent W(1)O4 tetrahedra, corners with three equivalent W(2)O4 tetrahedra,  an edgeedge with one Zn(1)O6 octahedra, and edges with two equivalent Cu(1)O5 trigonal bipyramids. The Zn(1)-O(1) bond length is 2.17 Å. The Zn(1)-O(4) bond length is 2.16 Å. The Zn(1)-O(7) bond length is 2.19 Å. The Zn(1)-O(8) bond length is 2.01 Å. There is one shorter (2.02 Å) and one longer (2.51 Å) Zn(1)-O(3) bond length. There are eight inequivalent O sites. In the first O site, O(7) is bonded in a distorted T-shaped geometry to one W(1), one Cu(1), and one Zn(1) atom. In the second O site, O(8) is bonded in a distorted trigonal planar geometry to one W(2), one Cu(2), and one Zn(1) atom. In the third O site, O(1) is bonded in a trigonal non-coplanar geometry to one W(1), one Cu(1), and one Zn(1) atom. In the fourth O site, O(2) is bonded in a bent 150 degrees geometry to one W(1) and one Cu(2) atom. In the fifth O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to one W(2), one Cu(1), and two equivalent Zn(1) atoms. In the sixth O site, O(4) is bonded in a distorted trigonal planar geometry to one W(1), one Cu(2), and one Zn(1) atom. In the seventh O site, O(5) is bonded in a bent 120 degrees geometry to one W(2) and one Cu(1) atom. In the eighth O site, O(6) is bonded in a 3-coordinate geometry to one W(2), one Cu(1), and one Cu(2) atom.