Zn2C9H5O8 crystallizes in the trigonal R3c space group. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(2), one O(4), and two equivalent O(1) atoms to form ZnO4 tetrahedra that share corners with two equivalent Zn(2)O6 octahedra and corners with two equivalent Zn(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 73-75°. The Zn(1)-O(2) bond length is 2.00 Å. The Zn(1)-O(4) bond length is 1.96 Å. There is one shorter (1.96 Å) and one longer (1.99 Å) Zn(1)-O(1) bond length. In the second Zn site, Zn(2) is bonded to one O(1), one O(3), one O(5), one O(6), one O(7), and one O(8) atom to form corner-sharing ZnO6 octahedra. The Zn(2)-O(1) bond length is 2.13 Å. The Zn(2)-O(3) bond length is 2.11 Å. The Zn(2)-O(5) bond length is 2.20 Å. The Zn(2)-O(6) bond length is 2.10 Å. The Zn(2)-O(7) bond length is 2.28 Å. The Zn(2)-O(8) bond length is 2.06 Å. There are nine inequivalent C sites. In the first C site, C(3) is bonded in a trigonal planar geometry to one C(5), one C(7), and one C(8) atom. The C(3)-C(5) bond length is 1.39 Å. The C(3)-C(7) bond length is 1.40 Å. The C(3)-C(8) bond length is 1.49 Å. In the second C site, C(4) is bonded in a distorted single-bond geometry to one C(1), one C(2), and one H(3) atom. The C(4)-C(1) bond length is 1.39 Å. The C(4)-C(2) bond length is 1.39 Å. The C(4)-H(3) bond length is 0.93 Å. In the third C site, C(5) is bonded in a distorted single-bond geometry to one C(2), one C(3), and one H(4) atom. The C(5)-C(2) bond length is 1.40 Å. The C(5)-H(4) bond length is 0.93 Å. In the fourth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(2), and one O(3) atom. The C(6)-C(2) bond length is 1.50 Å. The C(6)-O(2) bond length is 1.27 Å. The C(6)-O(3) bond length is 1.26 Å. In the fifth C site, C(7) is bonded in a distorted single-bond geometry to one C(1), one C(3), and one H(5) atom. The C(7)-C(1) bond length is 1.39 Å. The C(7)-H(5) bond length is 0.93 Å. In the sixth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(3), one O(7), and one O(8) atom. The C(8)-O(7) bond length is 1.25 Å. The C(8)-O(8) bond length is 1.29 Å. In the seventh C site, C(9) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(4), and one O(5) atom. The C(9)-C(1) bond length is 1.50 Å. The C(9)-O(4) bond length is 1.27 Å. The C(9)-O(5) bond length is 1.25 Å. In the eighth C site, C(1) is bonded in a trigonal planar geometry to one C(4), one C(7), and one C(9) atom. In the ninth C site, C(2) is bonded in a trigonal planar geometry to one C(4), one C(5), and one C(6) atom. There are five inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. The H(1)-O(1) bond length is 0.98 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(6) atom. The H(2)-O(6) bond length is 0.82 Å. In the third H site, H(3) is bonded in a single-bond geometry to one C(4) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one C(5) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one C(7) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Zn(2), two equivalent Zn(1), and one H(1) atom. In the second O site, O(2) is bonded in a water-like geometry to one Zn(1) and one C(6) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(6) atom. In the fourth O site, O(4) is bonded in a water-like geometry to one Zn(1) and one C(9) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Zn(2) and one C(9) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Zn(2) and one H(2) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Zn(2) and one C(8) atom. In the eighth O site, O(8) is bonded in a bent 120 degrees geometry to one Zn(2) and one C(8) atom. Linkers: 6 [O]C(=O)c1cc(C([O])=O)cc(C([O])=O)c1. Metal clusters: 12 [Zn]. The MOF has largest included sphere 5.83 A, density 2.04 g/cm3, surface area 3025.68 m2/g, accessible volume 0.17 cm3/g