LiMn(PO4)2 crystallizes in the monoclinic P2_1/c space group. Li(1) is bonded in a distorted square co-planar geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Mn(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-48°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Li(1), one Mn(1), and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Li(1) and one P(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Li(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.
LiMn(PO4)2 crystallizes in the monoclinic P2_1/c space group. Li(1) is bonded in a distorted square co-planar geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Both Li(1)-O(1) bond lengths are 2.13 Å. Both Li(1)-O(2) bond lengths are 1.94 Å. Both Li(1)-O(3) bond lengths are 2.56 Å. Mn(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form MnO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra. Both Mn(1)-O(1) bond lengths are 1.97 Å. Both Mn(1)-O(3) bond lengths are 1.95 Å. Both Mn(1)-O(4) bond lengths are 1.93 Å. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-48°. The P(1)-O(1) bond length is 1.57 Å. The P(1)-O(2) bond length is 1.54 Å. The P(1)-O(3) bond length is 1.55 Å. The P(1)-O(4) bond length is 1.55 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Li(1), one Mn(1), and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one Li(1) and one P(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Li(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.