Co2P3O10 crystallizes in the triclinic P-1 space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(10), one O(5), and one O(6) atom to form CoO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the second Co site, Co(2) is bonded to one O(2), one O(4), one O(7), and one O(9) atom to form CoO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent Co(2)O4 tetrahedra. In the second P site, P(2) is bonded to one O(10), one O(3), one O(4), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(3)O4 tetrahedra. In the third P site, P(3) is bonded to one O(5), one O(6), one O(8), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent Co(1)O4 tetrahedra. There are ten 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 150 degrees geometry to one Co(2) and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Co(2) 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(3) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Co(1) and one P(3) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Co(2) and one P(1) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one P(2) and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Co(2) and one P(3) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Co(1) and one P(2) atom.
Co2P3O10 crystallizes in the triclinic P-1 space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(1), one O(10), one O(5), and one O(6) atom to form CoO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. The Co(1)-O(1) bond length is 1.95 Å. The Co(1)-O(10) bond length is 2.00 Å. The Co(1)-O(5) bond length is 1.95 Å. The Co(1)-O(6) bond length is 1.98 Å. In the second Co site, Co(2) is bonded to one O(2), one O(4), one O(7), and one O(9) atom to form CoO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. The Co(2)-O(2) bond length is 1.83 Å. The Co(2)-O(4) bond length is 1.92 Å. The Co(2)-O(7) bond length is 1.90 Å. The Co(2)-O(9) bond length is 1.82 Å. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent Co(2)O4 tetrahedra. The P(1)-O(1) bond length is 1.50 Å. The P(1)-O(2) bond length is 1.55 Å. The P(1)-O(3) bond length is 1.62 Å. The P(1)-O(7) bond length is 1.54 Å. In the second P site, P(2) is bonded to one O(10), one O(3), one O(4), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O4 tetrahedra,  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(3)O4 tetrahedra. The P(2)-O(10) bond length is 1.50 Å. The P(2)-O(3) bond length is 1.61 Å. The P(2)-O(4) bond length is 1.52 Å. The P(2)-O(8) bond length is 1.60 Å. In the third P site, P(3) is bonded to one O(5), one O(6), one O(8), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent Co(1)O4 tetrahedra. The P(3)-O(5) bond length is 1.51 Å. The P(3)-O(6) bond length is 1.52 Å. The P(3)-O(8) bond length is 1.65 Å. The P(3)-O(9) bond length is 1.56 Å. There are ten 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 150 degrees geometry to one Co(2) and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Co(2) 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(3) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Co(1) and one P(3) atom. In the seventh O site, O(7) is bonded in a bent 120 degrees geometry to one Co(2) and one P(1) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one P(2) and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Co(2) and one P(3) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Co(1) and one P(2) atom.