CoPO4 crystallizes in the monoclinic Pc space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(4), and one O(8) atom to form CoO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with three equivalent P(1)O4 tetrahedra. In the second Co site, Co(2) is bonded to one O(3), one O(5), one O(6), and one O(7) atom to form CoO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra and corners with three equivalent Co(1)O4 tetrahedra. In the second P site, P(2) is bonded to one O(3), one O(5), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra and corners with three equivalent Co(2)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Co(2) and one P(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Co(1) and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Co(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a linear geometry to one Co(2) and one P(1) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Co(1) and one P(2) atom.
CoPO4 crystallizes in the monoclinic Pc space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(2), one O(4), and one O(8) atom to form CoO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with three equivalent P(1)O4 tetrahedra. The Co(1)-O(1) bond length is 1.86 Å. The Co(1)-O(2) bond length is 1.83 Å. The Co(1)-O(4) bond length is 1.85 Å. The Co(1)-O(8) bond length is 1.83 Å. In the second Co site, Co(2) is bonded to one O(3), one O(5), one O(6), and one O(7) atom to form CoO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with three equivalent P(2)O4 tetrahedra. The Co(2)-O(3) bond length is 1.83 Å. The Co(2)-O(5) bond length is 1.85 Å. The Co(2)-O(6) bond length is 1.86 Å. The Co(2)-O(7) bond length is 1.81 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra and corners with three equivalent Co(1)O4 tetrahedra. The P(1)-O(1) bond length is 1.53 Å. The P(1)-O(2) bond length is 1.54 Å. The P(1)-O(4) bond length is 1.53 Å. The P(1)-O(7) bond length is 1.52 Å. In the second P site, P(2) is bonded to one O(3), one O(5), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra and corners with three equivalent Co(2)O4 tetrahedra. The P(2)-O(3) bond length is 1.54 Å. The P(2)-O(5) bond length is 1.53 Å. The P(2)-O(6) bond length is 1.53 Å. The P(2)-O(8) bond length is 1.53 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Co(2) and one P(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Co(1) and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Co(2) and one P(2) atom. In the seventh O site, O(7) is bonded in a linear geometry to one Co(2) and one P(1) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one Co(1) and one P(2) atom.