ZnC7H6O4 crystallizes in the tetragonal I4_1/a space group. Zn(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Zn(1)-O(1) bond lengths are 1.97 Å. Both Zn(1)-O(2) bond lengths are 1.96 Å. There are four inequivalent C sites. In the first C site, C(2) is bonded to one C(1), one C(4), and two equivalent C(3) atoms to form corner-sharing CC4 tetrahedra. The C(2)-C(1) bond length is 1.52 Å. The C(2)-C(4) bond length is 1.53 Å. There is one shorter (1.54 Å) and one longer (1.55 Å) C(2)-C(3) bond length. In the second C site, C(3) is bonded in a distorted water-like geometry to two equivalent C(2), one H(1), and one H(2) atom. The C(3)-H(1) bond length is 1.10 Å. The C(3)-H(2) bond length is 1.10 Å. In the third C site, C(4) is bonded in a distorted water-like geometry to two equivalent C(2) and two equivalent H(3) atoms. Both C(4)-H(3) bond lengths are 1.10 Å. In the fourth C site, C(1) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(1)-O(1) bond length is 1.27 Å. The C(1)-O(2) bond length is 1.27 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(3) 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(4) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Zn(1) and one C(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(1) atom. Linkers: 2 [O]C(=O)[C@]12C[C@]3(C([O])=O)C[C@](C([O])=O)(C1)C[C@](C([O])=O)(C2)C3. Metal clusters: 4 [Zn]. The MOF has largest included sphere 1.72 A, density 2.13 g/cm3, surface area 3346.55 m2/g, accessible volume 0.11 cm3/g