CoZn6(PO4)6 crystallizes in the trigonal R-3 space group. Co(1) is bonded to six equivalent O(1) atoms to form CoO6 octahedra that share corners with six equivalent Zn(1)O4 tetrahedra and corners with six equivalent P(1)O4 tetrahedra. All Co(1)-O(1) bond lengths are 2.13 Å. Zn(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form ZnO4 tetrahedra that share  a cornercorner with one Co(1)O6 octahedra and corners with four equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 69°. The Zn(1)-O(1) bond length is 1.99 Å. The Zn(1)-O(2) bond length is 1.92 Å. The Zn(1)-O(3) bond length is 1.96 Å. The Zn(1)-O(4) bond length is 1.88 Å. 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  a cornercorner with one Co(1)O6 octahedra and corners with four equivalent Zn(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. The P(1)-O(1) bond length is 1.54 Å. The P(1)-O(2) bond length is 1.51 Å. The P(1)-O(3) bond length is 1.52 Å. The P(1)-O(4) bond length is 1.52 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Co(1), one Zn(1), and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Zn(1) and one P(1) atom. Linkers: 18 [O]P([O])([O])=O. Metal clusters: 18 [Zn] ,3 [Co]. The MOF has largest included sphere 6.66 A, density 2.13 g/cm3, surface area 2107.28 m2/g, accessible volume 0.23 cm3/g