Co7(PO4)6 crystallizes in the monoclinic P2_1/c space group. There are four inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(11), one O(2), one O(5), one O(7), and one O(8) atom to form distorted CoO5 trigonal bipyramids that share  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 58°. The Co(1)-O(11) bond length is 1.99 Å. The Co(1)-O(2) bond length is 1.99 Å. The Co(1)-O(5) bond length is 2.03 Å. The Co(1)-O(7) bond length is 2.42 Å. The Co(1)-O(8) bond length is 1.93 Å. In the second Co site, Co(2) is bonded to one O(1), one O(10), one O(3), and one O(7) atom to form CoO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra,  a cornercorner with one Co(1)O5 trigonal bipyramid, and corners with two equivalent Co(3)O5 trigonal bipyramids. The Co(2)-O(1) bond length is 1.99 Å. The Co(2)-O(10) bond length is 2.00 Å. The Co(2)-O(3) bond length is 1.94 Å. The Co(2)-O(7) bond length is 1.94 Å. In the third Co site, Co(3) is bonded to one O(1), one O(10), one O(12), one O(6), and one O(9) atom to form distorted CoO5 trigonal bipyramids that share  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra,  a cornercorner with one P(3)O4 tetrahedra, corners with two equivalent Co(2)O4 tetrahedra,  an edgeedge with one Co(4)O6 octahedra, and  an edgeedge with one P(3)O4 tetrahedra. The Co(3)-O(1) bond length is 2.00 Å. The Co(3)-O(10) bond length is 2.05 Å. The Co(3)-O(12) bond length is 2.27 Å. The Co(3)-O(6) bond length is 1.95 Å. The Co(3)-O(9) bond length is 1.99 Å. In the fourth Co site, Co(4) is bonded to two equivalent O(12), two equivalent O(5), and two equivalent O(9) atoms to form CoO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra, corners with four equivalent P(3)O4 tetrahedra, corners with two equivalent Co(1)O5 trigonal bipyramids, and edges with two equivalent Co(3)O5 trigonal bipyramids. Both Co(4)-O(12) bond lengths are 2.01 Å. Both Co(4)-O(5) bond lengths are 2.15 Å. Both Co(4)-O(9) bond lengths are 2.24 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(4) atom to form PO4 tetrahedra that share corners with two equivalent Co(2)O4 tetrahedra,  a cornercorner with one Co(1)O5 trigonal bipyramid, and  a cornercorner with one Co(3)O5 trigonal bipyramid. The P(1)-O(1) bond length is 1.57 Å. The P(1)-O(2) bond length is 1.54 Å. The P(1)-O(3) bond length is 1.53 Å. The P(1)-O(4) bond length is 1.50 Å. In the second P site, P(2) is bonded to one O(5), one O(6), one O(7), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Co(4)O6 octahedra,  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(1)O5 trigonal bipyramid,  a cornercorner with one Co(3)O5 trigonal bipyramid, and  an edgeedge with one Co(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 50°. The P(2)-O(5) bond length is 1.55 Å. The P(2)-O(6) bond length is 1.52 Å. The P(2)-O(7) bond length is 1.55 Å. The P(2)-O(8) bond length is 1.52 Å. In the third P site, P(3) is bonded to one O(10), one O(11), one O(12), and one O(9) atom to form PO4 tetrahedra that share corners with two equivalent Co(4)O6 octahedra,  a cornercorner with one Co(2)O4 tetrahedra,  a cornercorner with one Co(1)O5 trigonal bipyramid,  a cornercorner with one Co(3)O5 trigonal bipyramid, and  an edgeedge with one Co(3)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 32-54°. The P(3)-O(10) bond length is 1.58 Å. The P(3)-O(11) bond length is 1.52 Å. The P(3)-O(12) bond length is 1.52 Å. The P(3)-O(9) bond length is 1.53 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Co(2), one Co(3), and one P(1) atom. In the second O site, O(2) is bonded in a 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(1) atom. In the fourth O site, O(4) is bonded in a single-bond geometry to one P(1) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Co(1), one Co(4), and one P(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Co(3) and one P(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Co(1), 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 Co(1) and one P(2) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Co(3), one Co(4), and one P(3) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Co(2), one Co(3), and one P(3) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Co(1) and one P(3) atom. In the twelfth O site, O(12) is bonded in a distorted T-shaped geometry to one Co(3), one Co(4), and one P(3) atom. Linkers: 12 [O]P([O])([O])=O. Metal clusters: 14 [Co]. The MOF has largest included sphere 3.82 A, density 2.59 g/cm3, surface area 1804.59 m2/g, accessible volume 0.10 cm3/g