Co3GaP4O17 crystallizes in the orthorhombic Pbcm 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(6) atom to form CoO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and  a cornercorner with one P(2)O5 trigonal bipyramid. The Co(1)-O(1) bond length is 1.94 Å. The Co(1)-O(2) bond length is 1.91 Å. The Co(1)-O(4) bond length is 1.91 Å. The Co(1)-O(6) bond length is 1.97 Å. In the second Co site, Co(2) is bonded to one O(10), one O(9), and two equivalent O(3) atoms to form CoO4 tetrahedra that share  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and  a cornercorner with one P(2)O5 trigonal bipyramid. The Co(2)-O(10) bond length is 1.95 Å. The Co(2)-O(9) bond length is 1.94 Å. Both Co(2)-O(3) bond lengths are 1.98 Å. Ga(1) is bonded in a 5-coordinate geometry to one O(8), two equivalent O(5), and two equivalent O(7) atoms. The Ga(1)-O(8) bond length is 1.81 Å. Both Ga(1)-O(5) bond lengths are 2.01 Å. Both Ga(1)-O(7) bond lengths are 1.96 Å. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra and corners with two equivalent Co(1)O4 tetrahedra. The P(1)-O(1) bond length is 1.54 Å. The P(1)-O(3) bond length is 1.44 Å. The P(1)-O(4) bond length is 1.48 Å. The P(1)-O(5) bond length is 1.39 Å. In the second P site, P(2) is bonded to one O(10), two equivalent O(6), and two equivalent O(7) atoms to form distorted PO5 trigonal bipyramids that share  a cornercorner with one Co(2)O4 tetrahedra and corners with two equivalent Co(1)O4 tetrahedra. The P(2)-O(10) bond length is 1.51 Å. Both P(2)-O(6) bond lengths are 1.43 Å. Both P(2)-O(7) bond lengths are 1.50 Å. In the third P site, P(3) is bonded to one O(8), one O(9), and two equivalent O(2) atoms to form PO4 tetrahedra that share  a cornercorner with one Co(2)O4 tetrahedra and corners with two equivalent Co(1)O4 tetrahedra. The P(3)-O(8) bond length is 1.53 Å. The P(3)-O(9) bond length is 1.52 Å. Both P(3)-O(2) bond lengths are 1.55 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 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(1) and one P(3) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Co(2) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 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 Ga(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Co(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Ga(1), one P(2), and one O(7) atom. The O(7)-O(7) bond length is 1.42 Å. In the eighth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Co(2) and one P(3) atom. In the ninth O site, O(10) is bonded in a distorted bent 150 degrees geometry to one Co(2) and one P(2) atom. In the tenth O site, O(8) is bonded in a bent 120 degrees geometry to one Ga(1) and one P(3) atom. Linkers: 4 [O]P1([O])([O])OO1. Metal clusters: 4 [Ga] ,12 [Co]. The MOF has largest included sphere 4.93 A, density 2.16 g/cm3, surface area 2194.57 m2/g, accessible volume 0.20 cm3/g