MnPO4 crystallizes in the orthorhombic Pnma space group. Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra and edges with two equivalent Mn(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 Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-56°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Mn(1) and one P(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Mn(1) and one P(1) atom.
MnPO4 crystallizes in the orthorhombic Pnma space group. Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra and edges with two equivalent Mn(1)O6 octahedra. Both Mn(1)-O(1) bond lengths are 1.85 Å. Both Mn(1)-O(2) bond lengths are 2.23 Å. Both Mn(1)-O(3) bond lengths are 2.03 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 Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-56°. The P(1)-O(2) bond length is 1.52 Å. The P(1)-O(3) bond length is 1.58 Å. Both P(1)-O(1) bond lengths are 1.53 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Mn(1) and one P(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Mn(1) and one P(1) atom.