MnPO4 crystallizes in the trigonal R-3c space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 6-coordinate geometry to six equivalent O(2) atoms. In the second Mn site, Mn(2) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form MnO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. 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 Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-46°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Mn(2) and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Mn(1), one Mn(2), and one P(1) atom.
MnPO4 crystallizes in the trigonal R-3c space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 6-coordinate geometry to six equivalent O(2) atoms. All Mn(1)-O(2) bond lengths are 2.25 Å. In the second Mn site, Mn(2) is bonded to three equivalent O(1) and three equivalent O(2) atoms to form MnO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. All Mn(2)-O(1) bond lengths are 1.94 Å. All Mn(2)-O(2) bond lengths are 2.03 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 Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 29-46°. Both P(1)-O(1) bond lengths are 1.53 Å. Both P(1)-O(2) bond lengths are 1.57 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Mn(2) and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Mn(1), one Mn(2), and one P(1) atom.