Al3(PO4)4 crystallizes in the cubic P-43n space group. There are three inequivalent Al sites. In the first Al site, Al(1) is bonded to four equivalent O(4) atoms to form AlO4 tetrahedra that share corners with four equivalent P(1)O4 tetrahedra. All Al(1)-O(4) bond lengths are 1.75 Å. In the second Al site, Al(2) is bonded to four equivalent O(2) atoms to form AlO4 tetrahedra that share corners with four equivalent P(1)O4 tetrahedra. All Al(2)-O(2) bond lengths are 1.80 Å. In the third Al site, Al(3) is bonded to four equivalent O(3) atoms to form AlO4 tetrahedra that share corners with four equivalent P(1)O4 tetrahedra. All Al(3)-O(3) bond lengths are 1.85 Å. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share  a cornercorner with one Al(1)O4 tetrahedra,  a cornercorner with one Al(2)O4 tetrahedra, and  a cornercorner with one Al(3)O4 tetrahedra. The P(1)-O(1) bond length is 1.51 Å. The P(1)-O(2) bond length is 1.55 Å. The P(1)-O(3) bond length is 1.54 Å. The P(1)-O(4) bond length is 1.54 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a single-bond geometry to one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Al(2) and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Al(3) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one Al(1) and one P(1) atom. Linkers: 24 [O]P([O])([O])=O. Metal clusters: 18 [Al]. RCSR code: nju. The MOF has largest included sphere 10.61 A, density 0.97 g/cm3, surface area 3423.53 m2/g, accessible volume 0.71 cm3/g