AlC24N3O7 crystallizes in the tetragonal I4_1/a space group. Al(1) is bonded to one O(1), one O(2), one O(3), one O(4), and two equivalent O(7) atoms to form corner-sharing AlO6 octahedra. The corner-sharing octahedral tilt angles are 45°. The Al(1)-O(1) bond length is 1.89 Å. The Al(1)-O(2) bond length is 2.03 Å. The Al(1)-O(3) bond length is 1.99 Å. The Al(1)-O(4) bond length is 2.01 Å. There is one shorter (1.86 Å) and one longer (1.93 Å) Al(1)-O(7) bond length. There are twenty-four inequivalent C sites. In the first C site, C(1) is bonded in a distorted trigonal planar geometry to one C(4), one N(1), and one N(3) atom. The C(1)-C(4) bond length is 1.39 Å. The C(1)-N(1) bond length is 1.37 Å. The C(1)-N(3) bond length is 1.37 Å. In the second C site, C(2) is bonded in a distorted trigonal planar geometry to one C(11), one N(1), and one N(2) atom. The C(2)-C(11) bond length is 1.39 Å. The C(2)-N(1) bond length is 1.37 Å. The C(2)-N(2) bond length is 1.37 Å. In the third C site, C(3) is bonded in a distorted bent 120 degrees geometry to one C(18), one N(2), and one N(3) atom. The C(3)-C(18) bond length is 1.39 Å. The C(3)-N(2) bond length is 1.37 Å. The C(3)-N(3) bond length is 1.37 Å. In the fourth C site, C(4) is bonded in a trigonal planar geometry to one C(1), one C(5), and one C(9) atom. The C(4)-C(5) bond length is 1.37 Å. The C(4)-C(9) bond length is 1.37 Å. In the fifth C site, C(5) is bonded in a bent 120 degrees geometry to one C(4) and one C(6) atom. The C(5)-C(6) bond length is 1.37 Å. In the sixth C site, C(6) is bonded in a bent 120 degrees geometry to one C(5) and one C(7) atom. The C(6)-C(7) bond length is 1.37 Å. In the seventh C site, C(7) is bonded in a trigonal planar geometry to one C(10), one C(6), and one C(8) atom. The C(7)-C(10) bond length is 1.50 Å. The C(7)-C(8) bond length is 1.37 Å. In the eighth C site, C(8) is bonded in a bent 120 degrees geometry to one C(7) and one C(9) atom. The C(8)-C(9) bond length is 1.37 Å. In the ninth C site, C(9) is bonded in a bent 120 degrees geometry to one C(4) and one C(8) atom. In the tenth C site, C(10) is bonded in a distorted bent 120 degrees geometry to one C(7), one O(1), and one O(2) atom. The C(10)-O(1) bond length is 1.29 Å. The C(10)-O(2) bond length is 1.29 Å. In the eleventh C site, C(11) is bonded in a trigonal planar geometry to one C(12), one C(16), and one C(2) atom. The C(11)-C(12) bond length is 1.37 Å. The C(11)-C(16) bond length is 1.37 Å. In the twelfth C site, C(12) is bonded in a bent 120 degrees geometry to one C(11) and one C(13) atom. The C(12)-C(13) bond length is 1.37 Å. In the thirteenth C site, C(13) is bonded in a bent 120 degrees geometry to one C(12) and one C(14) atom. The C(13)-C(14) bond length is 1.37 Å. In the fourteenth C site, C(14) is bonded in a trigonal planar geometry to one C(13), one C(15), and one C(17) atom. The C(14)-C(15) bond length is 1.37 Å. The C(14)-C(17) bond length is 1.50 Å. In the fifteenth C site, C(15) is bonded in a bent 120 degrees geometry to one C(14) and one C(16) atom. The C(15)-C(16) bond length is 1.37 Å. In the sixteenth C site, C(16) is bonded in a bent 120 degrees geometry to one C(11) and one C(15) atom. In the seventeenth C site, C(17) is bonded in a distorted bent 120 degrees geometry to one C(14), one O(3), and one O(4) atom. The C(17)-O(3) bond length is 1.29 Å. The C(17)-O(4) bond length is 1.29 Å. In the eighteenth C site, C(18) is bonded in a trigonal planar geometry to one C(19), one C(23), and one C(3) atom. The C(18)-C(19) bond length is 1.37 Å. The C(18)-C(23) bond length is 1.37 Å. In the nineteenth C site, C(19) is bonded in a bent 120 degrees geometry to one C(18) and one C(20) atom. The C(19)-C(20) bond length is 1.37 Å. In the twentieth C site, C(20) is bonded in a distorted bent 120 degrees geometry to one C(19) and one C(21) atom. The C(20)-C(21) bond length is 1.37 Å. In the twenty-first C site, C(21) is bonded in a trigonal planar geometry to one C(20), one C(22), and one C(24) atom. The C(21)-C(22) bond length is 1.37 Å. The C(21)-C(24) bond length is 1.50 Å. In the twenty-second C site, C(22) is bonded in a bent 120 degrees geometry to one C(21) and one C(23) atom. The C(22)-C(23) bond length is 1.37 Å. In the twenty-third C site, C(23) is bonded in a distorted bent 120 degrees geometry to one C(18) and one C(22) atom. In the twenty-fourth C site, C(24) is bonded in a distorted bent 120 degrees geometry to one C(21) and two equivalent O(5,6) atoms. Both C(24)-O(5,6) bond lengths are 1.29 Å. There are three inequivalent N sites. In the first N site, N(1) is bonded in a bent 120 degrees geometry to one C(1) and one C(2) atom. In the second N site, N(2) is bonded in a bent 120 degrees geometry to one C(2) and one C(3) atom. In the third N site, N(3) is bonded in a bent 120 degrees geometry to one C(1) and one C(3) atom. 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(10) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Al(1) and one C(10) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Al(1) and one C(17) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Al(1) and one C(17) atom. In the fifth O site, O(5,6) is bonded in a single-bond geometry to one C(24) atom. In the sixth O site, O(7) is bonded in a distorted bent 150 degrees geometry to two equivalent Al(1) atoms. Linkers: 16 [O]C(=O)C1=[C][C]=C([C]=[C]1)C1=NC(=[N]=C([N]1)C1=[C][C]=C([C]=[C]1)C(=O)[O])C1=[C][C]=C([C]=[C]1)C(=O)[O] ,4 [O]C(=O)C1=[C][C]=C([C]=[C]1)C1=[N]=C(N=C([N]1)C1=[C][C]=[C][C]=[C]1)C1=[C][C]=C([C]=[C]1)C(=O)[O] ,4 [O][C]C1=[C][C]=C([C]=[C]1)C1=[N]=C([N]C(=N1)C1=[C][C]=C([C]=[C]1)C(=O)[O])C1=[C][C]=C([C]=[C]1)C(=O)[O]. Metal clusters: 16 [Al]. The MOF has largest included sphere 10.13 A, density 0.86 g/cm3, surface area 4442.74 m2/g, accessible volume 0.66 cm3/g