InPO4 crystallizes in the orthorhombic Pnma space group. In(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form InO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra and edges with two equivalent In(1)O6 octahedra. 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 six equivalent In(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-55°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one In(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent In(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent In(1) and one P(1) atom.
InPO4 crystallizes in the orthorhombic Pnma space group. In(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form InO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra and edges with two equivalent In(1)O6 octahedra. Both In(1)-O(1) bond lengths are 2.06 Å. Both In(1)-O(2) bond lengths are 2.29 Å. Both In(1)-O(3) bond lengths are 2.18 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 six equivalent In(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-55°. The P(1)-O(2) bond length is 1.55 Å. The P(1)-O(3) bond length is 1.56 Å. Both P(1)-O(1) bond lengths are 1.52 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one In(1) and one P(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to two equivalent In(1) and one P(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent In(1) and one P(1) atom.