AlPO4 is low (alpha) Cristobalite-derived structured and crystallizes in the trigonal R-3 space group. Al(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form AlO4 tetrahedra that share corners with four equivalent P(1)O4 tetrahedra. The Al(1)-O(1) bond length is 1.72 Å. The Al(1)-O(2) bond length is 1.72 Å. The Al(1)-O(3) bond length is 1.74 Å. The Al(1)-O(4) bond length is 1.72 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 corners with four equivalent Al(1)O4 tetrahedra. The P(1)-O(1) bond length is 1.54 Å. The P(1)-O(2) bond length is 1.54 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 bent 150 degrees geometry to one Al(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 150 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. 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: 18 [O]P([O])([O])=O. Metal clusters: 18 [Al]. The MOF has largest included sphere 6.92 A, density 1.49 g/cm3, surface area 2727.51 m2/g, accessible volume 0.36 cm3/g