Co2(PO3)5 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(10), one O(11), one O(13), one O(4), and one O(5) atom to form distorted CoO5 square pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. In the second Co site, Co(2) is bonded to one O(1), one O(14), one O(15), one O(6), and one O(7) atom to form distorted CoO5 square pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. There are five inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(12), one O(2), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. In the second P site, P(2) is bonded to one O(15), one O(2), one O(7), and one O(9) atom to form PO4 tetrahedra that share corners with two equivalent Co(2)O5 square pyramids,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. In the third P site, P(3) is bonded to one O(10), one O(11), one O(3), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Co(1)O5 square pyramids,  a cornercorner with one P(4)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. In the fourth P site, P(4) is bonded to one O(12), one O(14), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(3)O4 tetrahedra. In the fifth P site, P(5) is bonded to one O(13), one O(6), one O(8), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(3)O4 tetrahedra. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one P(3) and one P(4) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Co(1) and one P(4) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Co(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Co(2) and one P(5) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one P(2) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one P(3) and one P(5) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one P(2) and one P(5) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(3) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Co(1) and one P(3) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one P(1) and one P(4) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 150 degrees geometry to one Co(1) and one P(5) atom. In the fourteenth O site, O(14) is bonded in a bent 150 degrees geometry to one Co(2) and one P(4) atom. In the fifteenth O site, O(15) is bonded in a bent 150 degrees geometry to one Co(2) and one P(2) atom.
Co2(PO3)5 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(10), one O(11), one O(13), one O(4), and one O(5) atom to form distorted CoO5 square pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. The Co(1)-O(10) bond length is 1.97 Å. The Co(1)-O(11) bond length is 1.95 Å. The Co(1)-O(13) bond length is 2.04 Å. The Co(1)-O(4) bond length is 2.11 Å. The Co(1)-O(5) bond length is 1.93 Å. In the second Co site, Co(2) is bonded to one O(1), one O(14), one O(15), one O(6), and one O(7) atom to form distorted CoO5 square pyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. The Co(2)-O(1) bond length is 2.13 Å. The Co(2)-O(14) bond length is 1.96 Å. The Co(2)-O(15) bond length is 1.97 Å. The Co(2)-O(6) bond length is 2.09 Å. The Co(2)-O(7) bond length is 1.99 Å. There are five inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(12), one O(2), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(4)O4 tetrahedra. The P(1)-O(1) bond length is 1.51 Å. The P(1)-O(12) bond length is 1.58 Å. The P(1)-O(2) bond length is 1.60 Å. The P(1)-O(5) bond length is 1.50 Å. In the second P site, P(2) is bonded to one O(15), one O(2), one O(7), and one O(9) atom to form PO4 tetrahedra that share corners with two equivalent Co(2)O5 square pyramids,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. The P(2)-O(15) bond length is 1.50 Å. The P(2)-O(2) bond length is 1.63 Å. The P(2)-O(7) bond length is 1.50 Å. The P(2)-O(9) bond length is 1.60 Å. In the third P site, P(3) is bonded to one O(10), one O(11), one O(3), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Co(1)O5 square pyramids,  a cornercorner with one P(4)O4 tetrahedra, and  a cornercorner with one P(5)O4 tetrahedra. The P(3)-O(10) bond length is 1.50 Å. The P(3)-O(11) bond length is 1.51 Å. The P(3)-O(3) bond length is 1.62 Å. The P(3)-O(8) bond length is 1.59 Å. In the fourth P site, P(4) is bonded to one O(12), one O(14), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one P(1)O4 tetrahedra, and  a cornercorner with one P(3)O4 tetrahedra. The P(4)-O(12) bond length is 1.58 Å. The P(4)-O(14) bond length is 1.49 Å. The P(4)-O(3) bond length is 1.61 Å. The P(4)-O(4) bond length is 1.51 Å. In the fifth P site, P(5) is bonded to one O(13), one O(6), one O(8), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1)O5 square pyramid,  a cornercorner with one Co(2)O5 square pyramid,  a cornercorner with one P(2)O4 tetrahedra, and  a cornercorner with one P(3)O4 tetrahedra. The P(5)-O(13) bond length is 1.51 Å. The P(5)-O(6) bond length is 1.50 Å. The P(5)-O(8) bond length is 1.63 Å. The P(5)-O(9) bond length is 1.62 Å. There are fifteen inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one P(3) and one P(4) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one Co(1) and one P(4) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Co(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Co(2) and one P(5) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one P(2) atom. In the eighth O site, O(8) is bonded in a bent 150 degrees geometry to one P(3) and one P(5) atom. In the ninth O site, O(9) is bonded in a bent 150 degrees geometry to one P(2) and one P(5) atom. In the tenth O site, O(10) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(3) atom. In the eleventh O site, O(11) is bonded in a bent 150 degrees geometry to one Co(1) and one P(3) atom. In the twelfth O site, O(12) is bonded in a bent 150 degrees geometry to one P(1) and one P(4) atom. In the thirteenth O site, O(13) is bonded in a distorted bent 150 degrees geometry to one Co(1) and one P(5) atom. In the fourteenth O site, O(14) is bonded in a bent 150 degrees geometry to one Co(2) and one P(4) atom. In the fifteenth O site, O(15) is bonded in a bent 150 degrees geometry to one Co(2) and one P(2) atom.