AlPO4 crystallizes in the tetragonal I-42m space group. Al(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form AlO4 trigonal pyramids that share corners with four equivalent P(1)O4 tetrahedra. The Al(1)-O(2) bond length is 1.96 Å. The Al(1)-O(3) bond length is 1.95 Å. Both Al(1)-O(1) bond lengths are 1.88 Å. P(1) is bonded to one O(2), one O(3), and two equivalent O(1) atoms to form PO4 tetrahedra that share corners with four equivalent Al(1)O4 trigonal pyramids. The P(1)-O(2) bond length is 1.50 Å. The P(1)-O(3) bond length is 1.50 Å. Both P(1)-O(1) bond lengths are 1.56 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Al(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Al(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Al(1) and one P(1) atom. Linkers: 8 [O]P([O])([O])=O. Metal clusters: 8 [Al]. The MOF has largest included sphere 4.39 A, density 1.60 g/cm3, surface area 2754.16 m2/g, accessible volume 0.28 cm3/g