CuZnP2O7 crystallizes in the triclinic P-1 space group. Cu(1) is bonded to one O(2), one O(4), one O(7), and two equivalent O(6) atoms to form distorted CuO5 square pyramids that share corners with two equivalent P(2)O4 tetrahedra, corners with three equivalent P(1)O4 tetrahedra, and  an edgeedge with one Cu(1)O5 square pyramid. Zn(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(7), and two equivalent O(5) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with three equivalent Cu(1)O5 square pyramids and  a cornercorner with one P(2)O4 tetrahedra. In the second P site, P(2) is bonded to one O(1), one O(3), one O(4), and one O(7) atom to form PO4 tetrahedra that share corners with two equivalent Cu(1)O5 square pyramids and  a cornercorner with one P(1)O4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) 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 P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Cu(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Zn(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Cu(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Cu(1), one Zn(1), and one P(2) atom.
CuZnP2O7 crystallizes in the triclinic P-1 space group. Cu(1) is bonded to one O(2), one O(4), one O(7), and two equivalent O(6) atoms to form distorted CuO5 square pyramids that share corners with two equivalent P(2)O4 tetrahedra, corners with three equivalent P(1)O4 tetrahedra, and  an edgeedge with one Cu(1)O5 square pyramid. The Cu(1)-O(2) bond length is 2.02 Å. The Cu(1)-O(4) bond length is 1.97 Å. The Cu(1)-O(7) bond length is 1.98 Å. There is one shorter (1.93 Å) and one longer (2.48 Å) Cu(1)-O(6) bond length. Zn(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(7), and two equivalent O(5) atoms. The Zn(1)-O(2) bond length is 2.08 Å. The Zn(1)-O(3) bond length is 1.97 Å. The Zn(1)-O(7) bond length is 2.47 Å. There is one shorter (2.06 Å) and one longer (2.07 Å) Zn(1)-O(5) bond length. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with three equivalent Cu(1)O5 square pyramids and  a cornercorner with one P(2)O4 tetrahedra. The P(1)-O(1) bond length is 1.58 Å. The P(1)-O(2) bond length is 1.56 Å. The P(1)-O(5) bond length is 1.54 Å. The P(1)-O(6) bond length is 1.52 Å. In the second P site, P(2) is bonded to one O(1), one O(3), one O(4), and one O(7) atom to form PO4 tetrahedra that share corners with two equivalent Cu(1)O5 square pyramids and  a cornercorner with one P(1)O4 tetrahedra. The P(2)-O(1) bond length is 1.64 Å. The P(2)-O(3) bond length is 1.53 Å. The P(2)-O(4) bond length is 1.53 Å. The P(2)-O(7) bond length is 1.54 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) 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 P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Cu(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Zn(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to two equivalent Cu(1) and one P(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Cu(1), one Zn(1), and one P(2) atom.