CoCu(PO4)2 crystallizes in the monoclinic P2_1/m space group. Co(1) is bonded to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms to form distorted CoO6 octahedra that share  a cornercorner with one P(2)O4 tetrahedra, corners with three equivalent P(1)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. Cu(1) is bonded in a rectangular see-saw-like geometry to one O(2), one O(6), and two equivalent O(4) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form PO4 tetrahedra that share corners with three equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-50°. In the second P site, P(2) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra and  an edgeedge with one Co(1)O6 octahedra. The corner-sharing octahedral tilt angles are 47°. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Co(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cu(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Co(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Co(1), one Cu(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Cu(1) and one P(2) atom.
CoCu(PO4)2 crystallizes in the monoclinic P2_1/m space group. Co(1) is bonded to one O(1), one O(5), two equivalent O(3), and two equivalent O(4) atoms to form distorted CoO6 octahedra that share  a cornercorner with one P(2)O4 tetrahedra, corners with three equivalent P(1)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. The Co(1)-O(1) bond length is 1.98 Å. The Co(1)-O(5) bond length is 2.01 Å. Both Co(1)-O(3) bond lengths are 1.92 Å. Both Co(1)-O(4) bond lengths are 2.24 Å. Cu(1) is bonded in a rectangular see-saw-like geometry to one O(2), one O(6), and two equivalent O(4) atoms. The Cu(1)-O(2) bond length is 1.84 Å. The Cu(1)-O(6) bond length is 1.85 Å. Both Cu(1)-O(4) bond lengths are 1.89 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form PO4 tetrahedra that share corners with three equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-50°. The P(1)-O(1) bond length is 1.53 Å. The P(1)-O(2) bond length is 1.56 Å. Both P(1)-O(3) bond lengths are 1.56 Å. In the second P site, P(2) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form PO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra and  an edgeedge with one Co(1)O6 octahedra. The corner-sharing octahedral tilt angles are 47°. The P(2)-O(5) bond length is 1.51 Å. The P(2)-O(6) bond length is 1.55 Å. Both P(2)-O(4) bond lengths are 1.58 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Co(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Cu(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Co(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Co(1), one Cu(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Cu(1) and one P(2) atom.