MgMn2(PO5)2 crystallizes in the orthorhombic Fdd2 space group. Mg(1) is bonded in a distorted square co-planar geometry to two equivalent O(3) and two equivalent O(5) atoms. Mn(1) is bonded to one O(1), one O(3), one O(4), one O(5), and two equivalent O(2) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with four equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. P(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form PO4 tetrahedra that share corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-63°. There are five 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 bent 120 degrees geometry to two equivalent Mn(1) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mg(1), one Mn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one P(1) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Mg(1), one Mn(1), and one P(1) atom.
MgMn2(PO5)2 crystallizes in the orthorhombic Fdd2 space group. Mg(1) is bonded in a distorted square co-planar geometry to two equivalent O(3) and two equivalent O(5) atoms. Both Mg(1)-O(3) bond lengths are 2.19 Å. Both Mg(1)-O(5) bond lengths are 2.19 Å. Mn(1) is bonded to one O(1), one O(3), one O(4), one O(5), and two equivalent O(2) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with four equivalent P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 48°. The Mn(1)-O(1) bond length is 1.97 Å. The Mn(1)-O(3) bond length is 2.20 Å. The Mn(1)-O(4) bond length is 1.98 Å. The Mn(1)-O(5) bond length is 2.19 Å. Both Mn(1)-O(2) bond lengths are 1.82 Å. P(1) is bonded to one O(1), one O(3), one O(4), and one O(5) atom to form PO4 tetrahedra that share corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-63°. The P(1)-O(1) bond length is 1.55 Å. The P(1)-O(3) bond length is 1.56 Å. The P(1)-O(4) bond length is 1.55 Å. The P(1)-O(5) bond length is 1.56 Å. There are five 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 bent 120 degrees geometry to two equivalent Mn(1) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Mg(1), one Mn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one P(1) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Mg(1), one Mn(1), and one P(1) atom.