Co4Ga(PO4)5 crystallizes in the monoclinic C2 space group. There are three inequivalent Co sites. In the first Co site, Co(1,3) is bonded to one O(11), one O(4), one O(6), and one O(7) atom to form CoO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra, and corners with two equivalent P(2)O4 tetrahedra. The Co(1,3)-O(11) bond length is 1.87 Å. The Co(1,3)-O(4) bond length is 1.88 Å. The Co(1,3)-O(6) bond length is 1.90 Å. The Co(1,3)-O(7) bond length is 1.89 Å. In the second Co site, Co(2) is bonded to one O(10), one O(5), one O(8), and one O(9) atom to form CoO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(5)O4 tetrahedra, and corners with two equivalent P(1)O4 tetrahedra. The Co(2)-O(10) bond length is 1.94 Å. The Co(2)-O(5) bond length is 1.94 Å. The Co(2)-O(8) bond length is 1.92 Å. The Co(2)-O(9) bond length is 1.93 Å. In the third Co site, Co(4,5) is bonded to two equivalent O(2) and two equivalent O(3) atoms to form CoO4 tetrahedra that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. Both Co(4,5)-O(2) bond lengths are 1.91 Å. Both Co(4,5)-O(3) bond lengths are 1.92 Å. Ga(1) is bonded to one O(15), one O(18), one O(19), and one O(20) atom to form GaO4 tetrahedra that share  a cornercorner with one P(4)O4 tetrahedra,  a cornercorner with one P(6)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. The Ga(1)-O(15) bond length is 1.94 Å. The Ga(1)-O(18) bond length is 1.92 Å. The Ga(1)-O(19) bond length is 1.93 Å. The Ga(1)-O(20) bond length is 1.94 Å. There are six inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(10), one O(2), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1,3)O4 tetrahedra;  a cornercorner with one Co(4,5)O4 tetrahedra; and corners with two equivalent Co(2)O4 tetrahedra. The P(1)-O(1) bond length is 1.53 Å. The P(1)-O(10) bond length is 1.51 Å. The P(1)-O(2) bond length is 1.54 Å. The P(1)-O(8) bond length is 1.54 Å. In the second P site, P(2) is bonded to one O(3), one O(4), one O(6), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra;  a cornercorner with one Co(4,5)O4 tetrahedra; and corners with two equivalent Co(1,3)O4 tetrahedra. The P(2)-O(3) bond length is 1.52 Å. The P(2)-O(4) bond length is 1.51 Å. The P(2)-O(6) bond length is 1.52 Å. The P(2)-O(9) bond length is 1.52 Å. In the third P site, P(3) is bonded to one O(11), one O(12), one O(18), and one O(20) atom to form PO4 tetrahedra that share  a cornercorner with one Co(1,3)O4 tetrahedra;  a cornercorner with one Co(4,5)O4 tetrahedra; and corners with two equivalent Ga(1)O4 tetrahedra. The P(3)-O(11) bond length is 1.53 Å. The P(3)-O(12) bond length is 1.54 Å. The P(3)-O(18) bond length is 1.54 Å. The P(3)-O(20) bond length is 1.51 Å. In the fourth P site, P(4) is bonded to one O(13), one O(14), one O(16), and one O(19) atom to form PO4 tetrahedra that share  a cornercorner with one Co(4,5)O4 tetrahedra;  a cornercorner with one Ga(1)O4 tetrahedra; and corners with two equivalent Co(1,3)O4 tetrahedra. The P(4)-O(13) bond length is 1.52 Å. The P(4)-O(14) bond length is 1.51 Å. The P(4)-O(16) bond length is 1.52 Å. The P(4)-O(19) bond length is 1.52 Å. In the fifth P site, P(5) is bonded to two equivalent O(5) and two equivalent O(7) atoms to form PO4 tetrahedra that share corners with two equivalent Co(1,3)O4 tetrahedra and corners with two equivalent Co(2)O4 tetrahedra. Both P(5)-O(5) bond lengths are 1.50 Å. Both P(5)-O(7) bond lengths are 1.53 Å. In the sixth P site, P(6) is bonded to two equivalent O(15) and two equivalent O(17) atoms to form PO4 tetrahedra that share corners with two equivalent Co(1,3)O4 tetrahedra and corners with two equivalent Ga(1)O4 tetrahedra. Both P(6)-O(15) bond lengths are 1.50 Å. Both P(6)-O(17) bond lengths are 1.53 Å. There are twenty inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Co(1,3) and one P(1) atom. The O(1)-Co(1,3) bond length is 1.87 Å. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Co(4,5) and one P(1) atom. In the third O site, O(3) is bonded in a distorted bent 120 degrees geometry to one Co(4,5) and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Co(1,3) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Co(2) and one P(5) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Co(1,3) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Co(1,3) and one P(5) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Co(2) and one P(1) atom. In the ninth O site, O(9) is bonded in a distorted bent 150 degrees geometry to one Co(2) and one P(2) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Co(2) and one P(1) atom. In the eleventh O site, O(11) is bonded in a distorted bent 150 degrees geometry to one Co(1,3) and one P(3) atom. In the twelfth O site, O(12) is bonded in a bent 120 degrees geometry to one Co(4,5) and one P(3) atom. The O(12)-Co(4,5) bond length is 1.91 Å. In the thirteenth O site, O(13) is bonded in a distorted bent 120 degrees geometry to one Co(4,5) and one P(4) atom. The O(13)-Co(4,5) bond length is 1.92 Å. In the fourteenth O site, O(14) is bonded in a distorted bent 120 degrees geometry to one Co(1,3) and one P(4) atom. The O(14)-Co(1,3) bond length is 1.88 Å. In the fifteenth O site, O(15) is bonded in a distorted bent 150 degrees geometry to one Ga(1) and one P(6) atom. In the sixteenth O site, O(16) is bonded in a distorted bent 120 degrees geometry to one Co(1,3) and one P(4) atom. The O(16)-Co(1,3) bond length is 1.90 Å. In the seventeenth O site, O(17) is bonded in a distorted bent 150 degrees geometry to one Co(1,3) and one P(6) atom. The O(17)-Co(1,3) bond length is 1.89 Å. In the eighteenth O site, O(18) is bonded in a bent 120 degrees geometry to one Ga(1) and one P(3) atom. In the nineteenth O site, O(19) is bonded in a distorted bent 150 degrees geometry to one Ga(1) and one P(4) atom. In the twentieth O site, O(20) is bonded in a bent 120 degrees geometry to one Ga(1) and one P(3) atom. Linkers: 20 [O]P([O])([O])=O. Metal clusters: 4 [Ga] ,16 [Co]. The MOF has largest included sphere 4.17 A, density 2.05 g/cm3, surface area 2208.51 m2/g, accessible volume 0.20 cm3/g