Zn2C10H2O9 crystallizes in the orthorhombic Pnna space group. There are three inequivalent Zn sites. In the first Zn site, Zn(1) is bonded to one O(1), one O(4), one O(5), and one O(9) atom to form corner-sharing ZnO4 tetrahedra. The corner-sharing octahedral tilt angles range from 68-74°. The Zn(1)-O(1) bond length is 1.95 Å. The Zn(1)-O(4) bond length is 2.02 Å. The Zn(1)-O(5) bond length is 1.97 Å. The Zn(1)-O(9) bond length is 1.96 Å. In the second Zn site, Zn(2) is bonded to two equivalent O(2), two equivalent O(7), and two equivalent O(9) atoms to form ZnO6 octahedra that share corners with two equivalent Zn(3)O6 octahedra and corners with two equivalent Zn(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 62°. Both Zn(2)-O(2) bond lengths are 2.16 Å. Both Zn(2)-O(7) bond lengths are 2.06 Å. Both Zn(2)-O(9) bond lengths are 2.07 Å. In the third Zn site, Zn(3) is bonded to two equivalent O(6), two equivalent O(8), and two equivalent O(9) atoms to form ZnO6 octahedra 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 are 62°. Both Zn(3)-O(6) bond lengths are 2.36 Å. Both Zn(3)-O(8) bond lengths are 2.07 Å. Both Zn(3)-O(9) bond lengths are 2.00 Å. There are ten inequivalent C sites. In the first C site, C(1) is bonded in a distorted single-bond geometry to one C(2) and one H(1) atom. The C(1)-C(2) bond length is 1.40 Å. The C(1)-H(1) bond length is 0.93 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(1), one C(3), and one C(4) atom. The C(2)-C(3) bond length is 1.49 Å. The C(2)-C(4) bond length is 1.42 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(1), and one O(2) atom. The C(3)-O(1) bond length is 1.27 Å. The C(3)-O(2) bond length is 1.23 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(10), one C(2), and one C(5) atom. The C(4)-C(10) bond length is 1.50 Å. The C(4)-C(5) bond length is 1.44 Å. In the fifth C site, C(5) is bonded in a trigonal planar geometry to one C(4), one C(6), and one C(7) atom. The C(5)-C(6) bond length is 1.52 Å. The C(5)-C(7) bond length is 1.38 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(5), one O(5), and one O(6) atom. The C(6)-O(5) bond length is 1.27 Å. The C(6)-O(6) bond length is 1.23 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(5), one C(8), and one C(9) atom. The C(7)-C(8) bond length is 1.49 Å. The C(7)-C(9) bond length is 1.41 Å. In the eighth C site, C(8) is bonded in a distorted bent 120 degrees geometry to one C(7), one O(7), and one O(8) atom. The C(8)-O(7) bond length is 1.26 Å. The C(8)-O(8) bond length is 1.25 Å. In the ninth C site, C(9) is bonded in a single-bond geometry to one C(7) and one H(2) atom. The C(9)-H(2) bond length is 0.93 Å. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(4), one O(3), and one O(4) atom. The C(10)-O(3) bond length is 1.23 Å. The C(10)-O(4) bond length is 1.28 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one C(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one C(9) atom. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(3) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Zn(2) and one C(3) atom. In the third O site, O(3) is bonded in a single-bond geometry to one C(10) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(10) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Zn(1) and one C(6) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Zn(3) and one C(6) 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 distorted bent 120 degrees geometry to one Zn(3) and one C(8) atom. In the ninth O site, O(9) is bonded in a trigonal non-coplanar geometry to one Zn(1), one Zn(2), and one Zn(3) atom. Linkers: 8 [O]C(=O)c1ccc(C([O])=O)c(C([O])=O)c1C([O])=O. Metal clusters: 16 [Zn]. The MOF has largest included sphere 6.42 A, density 1.78 g/cm3, surface area 2845.64 m2/g, accessible volume 0.20 cm3/g