CuZnP2O7 crystallizes in the monoclinic C2 space group. Cu(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted CuO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. Zn(1) is bonded in a 4-coordinate geometry to two equivalent O(2) and two equivalent O(3) atoms. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with three equivalent Cu(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 40-58°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Cu(1) and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Cu(1), one Zn(1), and one P(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Cu(1), one Zn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a linear geometry to two equivalent P(1) atoms.
CuZnP2O7 crystallizes in the monoclinic C2 space group. Cu(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted CuO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. Both Cu(1)-O(1) bond lengths are 1.96 Å. Both Cu(1)-O(2) bond lengths are 2.47 Å. Both Cu(1)-O(3) bond lengths are 2.03 Å. Zn(1) is bonded in a 4-coordinate geometry to two equivalent O(2) and two equivalent O(3) atoms. Both Zn(1)-O(2) bond lengths are 1.99 Å. Both Zn(1)-O(3) bond lengths are 2.06 Å. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with three equivalent Cu(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 40-58°. The P(1)-O(1) bond length is 1.53 Å. The P(1)-O(2) bond length is 1.52 Å. The P(1)-O(3) bond length is 1.55 Å. The P(1)-O(4) bond length is 1.60 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Cu(1) and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Cu(1), one Zn(1), and one P(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Cu(1), one Zn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a linear geometry to two equivalent P(1) atoms.