Li2MnP2HO8 crystallizes in the monoclinic P2_1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(4), one O(5), one O(6), and one O(7) atom to form distorted LiO5 trigonal bipyramids that share  a cornercorner with one Mn(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one P(2)O4 tetrahedra, and  an edgeedge with one Li(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 73°. In the second Li site, Li(2) is bonded to one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form distorted LiO5 trigonal bipyramids that share  a cornercorner with one Mn(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one P(1)O4 tetrahedra, and  an edgeedge with one Li(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 72°. Mn(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(8) atom to form MnO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra,  a cornercorner with one Li(1)O5 trigonal bipyramid,  a cornercorner with one Li(2)O5 trigonal bipyramid,  an edgeedge with one Li(1)O5 trigonal bipyramid, and  an edgeedge with one Li(2)O5 trigonal bipyramid. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(3), one O(4), and one O(8) atom to form PO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra,  a cornercorner with one Li(1)O5 trigonal bipyramid, corners with two equivalent Li(2)O5 trigonal bipyramids, and  an edgeedge with one Li(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 29-52°. In the second P site, P(2) is bonded to one O(1), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra,  a cornercorner with one Li(2)O5 trigonal bipyramid, corners with two equivalent Li(1)O5 trigonal bipyramids, and  an edgeedge with one Li(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 30-52°. H(1) is bonded in a linear geometry to one O(4) and one O(7) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Li(1), one Mn(1), and one P(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Li(2), one Mn(1), and one P(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(2), one Mn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Li(1), one Li(2), one P(1), and one H(1) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Li(1), one Mn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Li(1), one Mn(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Li(1), one Li(2), one P(2), and one H(1) atom. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to one Li(2), one Mn(1), and one P(1) atom.
Li2MnP2HO8 crystallizes in the monoclinic P2_1 space group. There are two inequivalent Li sites. In the first Li site, Li(1) is bonded to one O(1), one O(4), one O(5), one O(6), and one O(7) atom to form distorted LiO5 trigonal bipyramids that share  a cornercorner with one Mn(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one P(2)O4 tetrahedra, and  an edgeedge with one Li(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 73°. The Li(1)-O(1) bond length is 2.02 Å. The Li(1)-O(4) bond length is 1.99 Å. The Li(1)-O(5) bond length is 2.01 Å. The Li(1)-O(6) bond length is 2.04 Å. The Li(1)-O(7) bond length is 2.35 Å. In the second Li site, Li(2) is bonded to one O(2), one O(3), one O(4), one O(7), and one O(8) atom to form distorted LiO5 trigonal bipyramids that share  a cornercorner with one Mn(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra,  an edgeedge with one Mn(1)O6 octahedra,  an edgeedge with one P(1)O4 tetrahedra, and  an edgeedge with one Li(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 72°. The Li(2)-O(2) bond length is 2.03 Å. The Li(2)-O(3) bond length is 2.00 Å. The Li(2)-O(4) bond length is 2.35 Å. The Li(2)-O(7) bond length is 2.04 Å. The Li(2)-O(8) bond length is 1.99 Å. Mn(1) is bonded to one O(1), one O(2), one O(3), one O(5), one O(6), and one O(8) atom to form MnO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra,  a cornercorner with one Li(1)O5 trigonal bipyramid,  a cornercorner with one Li(2)O5 trigonal bipyramid,  an edgeedge with one Li(1)O5 trigonal bipyramid, and  an edgeedge with one Li(2)O5 trigonal bipyramid. The Mn(1)-O(1) bond length is 1.95 Å. The Mn(1)-O(2) bond length is 2.20 Å. The Mn(1)-O(3) bond length is 1.99 Å. The Mn(1)-O(5) bond length is 2.23 Å. The Mn(1)-O(6) bond length is 2.02 Å. The Mn(1)-O(8) bond length is 1.93 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(3), one O(4), and one O(8) atom to form PO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra,  a cornercorner with one Li(1)O5 trigonal bipyramid, corners with two equivalent Li(2)O5 trigonal bipyramids, and  an edgeedge with one Li(2)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 29-52°. The P(1)-O(2) bond length is 1.53 Å. The P(1)-O(3) bond length is 1.57 Å. The P(1)-O(4) bond length is 1.54 Å. The P(1)-O(8) bond length is 1.56 Å. In the second P site, P(2) is bonded to one O(1), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra,  a cornercorner with one Li(2)O5 trigonal bipyramid, corners with two equivalent Li(1)O5 trigonal bipyramids, and  an edgeedge with one Li(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 30-52°. The P(2)-O(1) bond length is 1.55 Å. The P(2)-O(5) bond length is 1.52 Å. The P(2)-O(6) bond length is 1.55 Å. The P(2)-O(7) bond length is 1.59 Å. H(1) is bonded in a linear geometry to one O(4) and one O(7) atom. The H(1)-O(4) bond length is 1.41 Å. The H(1)-O(7) bond length is 1.07 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Li(1), one Mn(1), and one P(2) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Li(2), one Mn(1), and one P(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(2), one Mn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Li(1), one Li(2), one P(1), and one H(1) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Li(1), one Mn(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a trigonal planar geometry to one Li(1), one Mn(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Li(1), one Li(2), one P(2), and one H(1) atom. In the eighth O site, O(8) is bonded in a distorted T-shaped geometry to one Li(2), one Mn(1), and one P(1) atom.