AlC8H5O5 crystallizes in the orthorhombic Imm2 space group. Al(1) is bonded to one O(3), one O(4), two equivalent O(1), and two equivalent O(2) atoms to form corner-sharing AlO6 octahedra. The corner-sharing octahedral tilt angles are 48°. The Al(1)-O(3) bond length is 1.81 Å. The Al(1)-O(4) bond length is 1.81 Å. Both Al(1)-O(1) bond lengths are 1.90 Å. Both Al(1)-O(2) bond lengths are 1.92 Å. There are six inequivalent C sites. In the first C site, C(3) is bonded in a distorted trigonal planar geometry to one C(6) and two equivalent C(2) atoms. The C(3)-C(6) bond length is 1.48 Å. Both C(3)-C(2) bond lengths are 1.39 Å. In the second C site, C(4) is bonded in a distorted trigonal planar geometry to one C(5) and two equivalent C(1) atoms. The C(4)-C(5) bond length is 1.49 Å. Both C(4)-C(1) bond lengths are 1.39 Å. In the third C site, C(5) is bonded in a water-like geometry to one C(4) and two equivalent O(1) atoms. Both C(5)-O(1) bond lengths are 1.31 Å. In the fourth C site, C(6) is bonded in a bent 120 degrees geometry to one C(3) and two equivalent O(2) atoms. Both C(6)-O(2) bond lengths are 1.28 Å. In the fifth C site, C(1) is bonded in a distorted single-bond geometry to one C(2), one C(4), and one H(1) atom. The C(1)-C(2) bond length is 1.51 Å. The C(1)-H(1) bond length is 1.14 Å. In the sixth C site, C(2) is bonded in a distorted single-bond geometry to one C(1), one C(3), and one H(2) atom. The C(2)-H(2) bond length is 1.14 Å. There are four 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(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one O(3) atom. The H(3)-O(3) bond length is 1.00 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(4) atom. The H(4)-O(4) bond length is 1.00 Å. There are four inequivalent O sites. In the first O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Al(1) and one H(3) atom. In the second O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Al(1) and one H(4) atom. In the third O site, O(1) is bonded in a bent 150 degrees geometry to one Al(1) and one C(5) atom. In the fourth O site, O(2) is bonded in a bent 150 degrees geometry to one Al(1) and one C(6) atom. Linkers: 4 [O]C(=O)c1ccc(C([O])=O)cc1. Metal clusters: 4 [Al]. The MOF has largest included sphere 6.99 A, density 0.98 g/cm3, surface area 3843.78 m2/g, accessible volume 0.48 cm3/g