Cu2ZnH4(SO4)2 crystallizes in the monoclinic P2_1/c space group. Cu(1) is bonded to one S(1), one O(1), one O(2), and one O(3) atom to form distorted CuSO3 trigonal pyramids that share corners with three equivalent S(1)CuO3 tetrahedra and  an edgeedge with one Zn(1)O6 octahedra. Zn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form ZnO6 octahedra that share corners with four equivalent S(1)CuO3 tetrahedra and edges with two equivalent Cu(1)SO3 trigonal pyramids. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(4) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(4) atom. S(1) is bonded to one Cu(1), one O(1), one O(2), and one O(3) atom to form SCuO3 tetrahedra that share corners with two equivalent Zn(1)O6 octahedra and corners with three equivalent Cu(1)SO3 trigonal pyramids. The corner-sharing octahedral tilt angles range from 47-49°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Cu(1), one Zn(1), and one S(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Cu(1), one Zn(1), and one S(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Zn(1), one H(1), and one H(2) atom.
Cu2ZnH4(SO4)2 crystallizes in the monoclinic P2_1/c space group. Cu(1) is bonded to one S(1), one O(1), one O(2), and one O(3) atom to form distorted CuSO3 trigonal pyramids that share corners with three equivalent S(1)CuO3 tetrahedra and  an edgeedge with one Zn(1)O6 octahedra. The Cu(1)-S(1) bond length is 2.14 Å. The Cu(1)-O(1) bond length is 2.11 Å. The Cu(1)-O(2) bond length is 2.14 Å. The Cu(1)-O(3) bond length is 2.16 Å. Zn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(4) atoms to form ZnO6 octahedra that share corners with four equivalent S(1)CuO3 tetrahedra and edges with two equivalent Cu(1)SO3 trigonal pyramids. Both Zn(1)-O(1) bond lengths are 2.18 Å. Both Zn(1)-O(2) bond lengths are 2.22 Å. Both Zn(1)-O(4) bond lengths are 2.03 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(4) atom. The H(1)-O(4) bond length is 0.98 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(4) atom. The H(2)-O(4) bond length is 0.99 Å. S(1) is bonded to one Cu(1), one O(1), one O(2), and one O(3) atom to form SCuO3 tetrahedra that share corners with two equivalent Zn(1)O6 octahedra and corners with three equivalent Cu(1)SO3 trigonal pyramids. The corner-sharing octahedral tilt angles range from 47-49°. The S(1)-O(1) bond length is 1.55 Å. The S(1)-O(2) bond length is 1.55 Å. The S(1)-O(3) bond length is 1.51 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Cu(1), one Zn(1), and one S(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Cu(1), one Zn(1), and one S(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and one S(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal non-coplanar geometry to one Zn(1), one H(1), and one H(2) atom.