AlC7NH4O5 crystallizes in the orthorhombic Fddd space group. Al(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form corner-sharing AlO6 octahedra. The corner-sharing octahedral tilt angles range from 51-52°. The Al(1)-O(1) bond length is 1.91 Å. The Al(1)-O(2) bond length is 1.91 Å. The Al(1)-O(3) bond length is 1.92 Å. The Al(1)-O(4) bond length is 1.92 Å. The Al(1)-O(5) bond length is 1.86 Å. The Al(1)-O(6) bond length is 1.86 Å. There are seven inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one C(3), one C(5), and one C(7) atom. The C(1)-C(3) bond length is 1.40 Å. The C(1)-C(5) bond length is 1.49 Å. The C(1)-C(7) bond length is 1.40 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(4), one C(6), and one C(7) atom. The C(2)-C(4) bond length is 1.41 Å. The C(2)-C(6) bond length is 1.49 Å. The C(2)-C(7) bond length is 1.40 Å. In the third C site, C(3) is bonded in a distorted trigonal planar geometry to one C(1), one N(1), and one H(1) atom. The C(3)-N(1) bond length is 1.34 Å. The C(3)-H(1) bond length is 1.09 Å. In the fourth C site, C(4) is bonded in a distorted trigonal planar geometry to one C(2), one N(1), and one H(2) atom. The C(4)-N(1) bond length is 1.34 Å. The C(4)-H(2) bond length is 1.09 Å. In the fifth C site, C(5) is bonded in a distorted bent 120 degrees geometry to one C(1), one O(1), and one O(3) atom. The C(5)-O(1) bond length is 1.27 Å. The C(5)-O(3) bond length is 1.28 Å. In the sixth C site, C(6) is bonded in a distorted bent 120 degrees geometry to one C(2), one O(2), and one O(4) atom. The C(6)-O(2) bond length is 1.27 Å. The C(6)-O(4) bond length is 1.28 Å. In the seventh C site, C(7) is bonded in a distorted trigonal planar geometry to one C(1), one C(2), and one H(3) atom. The C(7)-H(3) bond length is 1.09 Å. N(1) is bonded in a bent 120 degrees geometry to one C(3) and one C(4) atom. There are four 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(4) atom. In the third H site, H(3) is bonded in a single-bond geometry to one C(7) atom. In the fourth H site, H(4,5) is bonded in a single-bond geometry to one O(5) atom. The H(4,5)-O(5) bond length is 0.97 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Al(1) and one C(5) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Al(1) and one C(6) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Al(1) and one C(5) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Al(1) and one C(6) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent Al(1) and one H(4,5) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to two equivalent Al(1) and one H(4,5) atom. The O(6)-H(4,5) bond length is 0.97 Å. Linkers: 8 [O]C(=O)c1cncc(C([O])=O)c1. Metal clusters: 8 [Al]. The MOF has largest included sphere 6.18 A, density 1.14 g/cm3, surface area 3979.57 m2/g, accessible volume 0.41 cm3/g