AlPO4 crystallizes in the orthorhombic Cmcm space group. Al(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form AlO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra and edges with two equivalent Al(1)O6 octahedra. P(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form PO4 tetrahedra that share corners with six equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. There are two 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 trigonal planar geometry to two equivalent Al(1) and one P(1) atom.
AlPO4 crystallizes in the orthorhombic Cmcm space group. Al(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form AlO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra and edges with two equivalent Al(1)O6 octahedra. Both Al(1)-O(1) bond lengths are 1.82 Å. All Al(1)-O(2) bond lengths are 2.01 Å. P(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form PO4 tetrahedra that share corners with six equivalent Al(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. Both P(1)-O(1) bond lengths are 1.52 Å. Both P(1)-O(2) bond lengths are 1.59 Å. There are two 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 trigonal planar geometry to two equivalent Al(1) and one P(1) atom.