AlC8N4O5 crystallizes in the orthorhombic Imma space group. Al(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form corner-sharing AlO6 octahedra. The corner-sharing octahedral tilt angles are 53°. Both Al(1)-O(2) bond lengths are 1.85 Å. All Al(1)-O(1) bond lengths are 1.93 Å. There are three inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(1), one C(2), and one N(1) atom. The C(1)-C(1) bond length is 1.42 Å. The C(1)-C(2) bond length is 1.41 Å. The C(1)-N(1) bond length is 1.41 Å. In the second C site, C(2) is bonded in a trigonal planar geometry to one C(3) and two equivalent C(1) atoms. The C(2)-C(3) bond length is 1.41 Å. In the third C site, C(3) is bonded in a bent 120 degrees geometry to one C(2) and two equivalent O(1) atoms. Both C(3)-O(1) bond lengths are 1.24 Å. N(1) is bonded in a distorted bent 150 degrees geometry to one C(1) and one N(1) atom. The N(1)-N(1) bond length is 1.74 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Al(1) and one C(3) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to two equivalent Al(1) atoms. Linkers: 1 [C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C]/[C]=[C]\[C]=N\N=[C]\[C].[C][C].[C][N].[C][N].[C][N].[C][N].[C][N].[C][N].[N].[N].[N].[N].[O].[O].[O].[O].[O][C]=O.[O][C]=O.[O][C]=O.[O][C]=O ,1 [C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C]=O.[C]=O.[C]=O.[C][N].[C][N].[C][N].[C][N].[C][N].[C][N][N].[N].[N].[N].[N].[N].[N].[N].[N][N].[O].[O].[O].[O].[O].[O][C]=O ,1 [C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C].[C]/[C]=N/[N].[C]=O.[C]=O.[C]=O.[C]=O.[C][N].[C][N].[C][N].[C][N].[C][N][N].[C][N][N].[C][N][N].[N].[N].[N].[N].[O].[O].[O].[O].[O].[O].[O].[O] ,1 [C].[C].[C].[C].[C].[C]=O.[C]=O.[C]=O.[C]=O.[C][N].[C][N].[C][N].[C][N].[C][N].[C][N].[C][N].[C][N].[N].[N].[N].[N].[N][N]c1[c][c]c([N][N])[c][c]1.[O].[O].[O].[O].[O][C]=O. Metal clusters: 4 [Al]. RCSR code: lvt. The MOF has largest included sphere 7.15 A, density 1.18 g/cm3, surface area 3123.80 m2/g, accessible volume 0.48 cm3/g