Co2ZnC18H6O13 crystallizes in the tetragonal I4cm space group. Co(1) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form CoO4 tetrahedra that share  a cornercorner with one Zn(1)O5 square pyramid and  a cornercorner with one Co(1)O4 tetrahedra. The Co(1)-O(4) bond length is 1.95 Å. The Co(1)-O(5) bond length is 2.00 Å. The Co(1)-O(6) bond length is 1.94 Å. The Co(1)-O(7) bond length is 1.97 Å. Zn(1) is bonded to one O(7), two equivalent O(1), and two equivalent O(3) atoms to form ZnO5 square pyramids that share corners with two equivalent Co(1)O4 tetrahedra. The Zn(1)-O(7) bond length is 2.09 Å. Both Zn(1)-O(1) bond lengths are 2.09 Å. Both Zn(1)-O(3) bond lengths are 2.10 Å. There are nine inequivalent C sites. In the first C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(3), and one O(4) atom. The C(1)-C(5) bond length is 1.55 Å. The C(1)-O(3) bond length is 1.22 Å. The C(1)-O(4) bond length is 1.31 Å. In the second C site, C(2) is bonded in a single-bond geometry to one C(6), one C(8), and one H(1) atom. The C(2)-C(6) bond length is 1.42 Å. The C(2)-C(8) bond length is 1.37 Å. The C(2)-H(1) bond length is 0.93 Å. In the third C site, C(3) is bonded in a distorted single-bond geometry to one C(5), one C(8), and one H(2) atom. The C(3)-C(5) bond length is 1.39 Å. The C(3)-C(8) bond length is 1.38 Å. The C(3)-H(2) bond length is 0.93 Å. In the fourth C site, C(4) is bonded in a bent 120 degrees geometry to one C(6), one O(1), and one O(5) atom. The C(4)-C(6) bond length is 1.45 Å. The C(4)-O(1) bond length is 1.29 Å. The C(4)-O(5) bond length is 1.31 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(9) atom. The C(5)-C(9) bond length is 1.38 Å. In the sixth C site, C(6) is bonded in a trigonal planar geometry to one C(2), one C(4), and one C(9) atom. The C(6)-C(9) bond length is 1.41 Å. In the seventh C site, C(7) is bonded in a distorted bent 120 degrees geometry to one C(8), one O(2), and one O(6) atom. The C(7)-C(8) bond length is 1.56 Å. The C(7)-O(2) bond length is 1.17 Å. The C(7)-O(6) bond length is 1.36 Å. In the eighth C site, C(8) is bonded in a trigonal planar geometry to one C(2), one C(3), and one C(7) atom. In the ninth C site, C(9) is bonded in a distorted single-bond geometry to one C(5), one C(6), and one H(3) atom. The C(9)-H(3) bond length is 0.93 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(2) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(3) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(9) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Zn(1) and one C(4) atom. In the second O site, O(2) is bonded in a single-bond geometry to one C(7) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Co(1) and one C(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Co(1) and one C(4) atom. In the sixth O site, O(6) is bonded in a water-like geometry to one Co(1) and one C(7) atom. In the seventh O site, O(7) is bonded in a trigonal non-coplanar geometry to two equivalent Co(1) and one Zn(1) atom. Linkers: 8 [O]C(=O)c1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 4 O=[C]O[Co@]12O[C]O[Zn]3(O[C]O[Co@](O[C]=O)(O[C]O3)O1)O[C]O2. RCSR code: sab. The MOF has largest included sphere 8.27 A, density 1.05 g/cm3, surface area 3481.09 m2/g, accessible volume 0.60 cm3/g