Co2PO5 crystallizes in the orthorhombic Imma space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form CoO6 octahedra that share corners with four equivalent Co(2)O6 octahedra, corners with four equivalent P(1)O4 tetrahedra, and faces with two equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles are 55°. In the second Co site, Co(2) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form CoO6 octahedra that share corners with four equivalent Co(1)O6 octahedra, corners with four equivalent P(1)O4 tetrahedra, and faces with two equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles are 55°. P(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form PO4 tetrahedra that share corners with four equivalent Co(1)O6 octahedra and corners with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-42°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Co(1) and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Co(2) and one P(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Co(1) and two equivalent Co(2) atoms.
Co2PO5 crystallizes in the orthorhombic Imma space group. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to two equivalent O(3) and four equivalent O(1) atoms to form CoO6 octahedra that share corners with four equivalent Co(2)O6 octahedra, corners with four equivalent P(1)O4 tetrahedra, and faces with two equivalent Co(1)O6 octahedra. The corner-sharing octahedral tilt angles are 55°. Both Co(1)-O(3) bond lengths are 1.94 Å. All Co(1)-O(1) bond lengths are 2.09 Å. In the second Co site, Co(2) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form CoO6 octahedra that share corners with four equivalent Co(1)O6 octahedra, corners with four equivalent P(1)O4 tetrahedra, and faces with two equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles are 55°. Both Co(2)-O(3) bond lengths are 2.20 Å. All Co(2)-O(2) bond lengths are 2.05 Å. P(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form PO4 tetrahedra that share corners with four equivalent Co(1)O6 octahedra and corners with four equivalent Co(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-42°. Both P(1)-O(1) bond lengths are 1.56 Å. Both P(1)-O(2) bond lengths are 1.54 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Co(1) and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Co(2) and one P(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Co(1) and two equivalent Co(2) atoms.