LiMnPO4 crystallizes in the monoclinic Pc space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(3), one O(5), one O(6), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Mn(2)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with three equivalent Mn(1)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. In the second Li site, Li(2) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Mn(1)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and corners with three equivalent Mn(2)O4 tetrahedra. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(3), one O(5), one O(6), and one O(7) atom to form distorted MnO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with three equivalent Li(1)O4 tetrahedra, and corners with three equivalent P(1)O4 tetrahedra. In the second Mn site, Mn(2) is bonded to one O(1), one O(2), one O(4), and one O(8) atom to form MnO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with three equivalent Li(2)O4 tetrahedra, and corners with three equivalent P(2)O4 tetrahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(3), one O(4), one O(5), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(2)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with three equivalent Mn(1)O4 tetrahedra. In the second P site, P(2) is bonded to one O(1), one O(2), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with three equivalent Mn(2)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Li(2), one Mn(2), and one P(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Li(2), one Mn(2), and one P(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar 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 trigonal planar geometry to one Li(2), one Mn(2), and one P(1) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Li(1), one Mn(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Li(1), one Mn(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Li(2), one Mn(1), and one P(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Li(1), one Mn(2), and one P(2) atom.
LiMnPO4 crystallizes in the monoclinic Pc space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(3), one O(5), one O(6), and one O(8) atom to form LiO4 tetrahedra that share  a cornercorner with one Mn(2)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with three equivalent Mn(1)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. The Li(1)-O(3) bond length is 1.92 Å. The Li(1)-O(5) bond length is 1.96 Å. The Li(1)-O(6) bond length is 2.07 Å. The Li(1)-O(8) bond length is 1.99 Å. In the second Li site, Li(2) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form LiO4 tetrahedra that share  a cornercorner with one Mn(1)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and corners with three equivalent Mn(2)O4 tetrahedra. The Li(2)-O(1) bond length is 2.09 Å. The Li(2)-O(2) bond length is 1.99 Å. The Li(2)-O(4) bond length is 2.04 Å. The Li(2)-O(7) bond length is 2.05 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(3), one O(5), one O(6), and one O(7) atom to form distorted MnO4 tetrahedra that share  a cornercorner with one Li(2)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with three equivalent Li(1)O4 tetrahedra, and corners with three equivalent P(1)O4 tetrahedra. The Mn(1)-O(3) bond length is 2.06 Å. The Mn(1)-O(5) bond length is 2.08 Å. The Mn(1)-O(6) bond length is 2.04 Å. The Mn(1)-O(7) bond length is 2.15 Å. In the second Mn site, Mn(2) is bonded to one O(1), one O(2), one O(4), and one O(8) atom to form MnO4 tetrahedra that share  a cornercorner with one Li(1)O4 tetrahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with three equivalent Li(2)O4 tetrahedra, and corners with three equivalent P(2)O4 tetrahedra. The Mn(2)-O(1) bond length is 2.06 Å. The Mn(2)-O(2) bond length is 2.04 Å. The Mn(2)-O(4) bond length is 2.09 Å. The Mn(2)-O(8) bond length is 2.05 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(3), one O(4), one O(5), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(2)O4 tetrahedra, corners with two equivalent Li(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, and corners with three equivalent Mn(1)O4 tetrahedra. 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. The P(1)-O(7) bond length is 1.56 Å. In the second P site, P(2) is bonded to one O(1), one O(2), one O(6), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O4 tetrahedra, corners with two equivalent Li(2)O4 tetrahedra, corners with three equivalent Mn(2)O4 tetrahedra, and  an edgeedge with one Li(1)O4 tetrahedra. The P(2)-O(1) bond length is 1.56 Å. The P(2)-O(2) bond length is 1.56 Å. The P(2)-O(6) bond length is 1.55 Å. The P(2)-O(8) bond length is 1.55 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Li(2), one Mn(2), and one P(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Li(2), one Mn(2), and one P(2) atom. In the third O site, O(3) is bonded in a distorted trigonal planar 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 trigonal planar geometry to one Li(2), one Mn(2), and one P(1) atom. In the fifth O site, O(5) is bonded in a trigonal planar geometry to one Li(1), one Mn(1), and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted T-shaped geometry to one Li(1), one Mn(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted trigonal planar geometry to one Li(2), one Mn(1), and one P(1) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one Li(1), one Mn(2), and one P(2) atom.