MnP2H4O5 crystallizes in the monoclinic P2_1/c space group. Mn(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form MnO6 octahedra that share corners with two equivalent P(2)H2O2 tetrahedra, corners with three equivalent P(1)H2O2 tetrahedra, and  an edgeedge with one Mn(1)O6 octahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one H(1), one H(2), one O(1), and one O(2) atom to form distorted PH2O2 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-53°. In the second P site, P(2) is bonded to one H(3), one H(4), one O(3), and one O(4) atom to form distorted PH2O2 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-56°. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one P(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one P(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one P(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one P(2) atom. There are five inequivalent O sites. In the first O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one P(1) atom. In the second O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one P(2) atom. In the third O site, O(4) is bonded in a bent 120 degrees geometry to one Mn(1) and one P(2) atom. In the fourth O site, O(5) is bonded in a single-bond geometry to one Mn(1) atom. In the fifth O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Mn(1) and one P(1) atom.
MnP2H4O5 crystallizes in the monoclinic P2_1/c space group. Mn(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form MnO6 octahedra that share corners with two equivalent P(2)H2O2 tetrahedra, corners with three equivalent P(1)H2O2 tetrahedra, and  an edgeedge with one Mn(1)O6 octahedra. The Mn(1)-O(2) bond length is 2.03 Å. The Mn(1)-O(3) bond length is 2.09 Å. The Mn(1)-O(4) bond length is 2.03 Å. The Mn(1)-O(5) bond length is 1.75 Å. There is one shorter (2.14 Å) and one longer (2.29 Å) Mn(1)-O(1) bond length. There are two inequivalent P sites. In the first P site, P(1) is bonded to one H(1), one H(2), one O(1), and one O(2) atom to form distorted PH2O2 tetrahedra that share corners with three equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-53°. The P(1)-H(1) bond length is 1.42 Å. The P(1)-H(2) bond length is 1.41 Å. The P(1)-O(1) bond length is 1.55 Å. The P(1)-O(2) bond length is 1.53 Å. In the second P site, P(2) is bonded to one H(3), one H(4), one O(3), and one O(4) atom to form distorted PH2O2 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-56°. The P(2)-H(3) bond length is 1.42 Å. The P(2)-H(4) bond length is 1.42 Å. The P(2)-O(3) bond length is 1.53 Å. The P(2)-O(4) bond length is 1.54 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one P(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one P(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one P(2) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one P(2) atom. There are five inequivalent O sites. In the first O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one P(1) atom. In the second O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Mn(1) and one P(2) atom. In the third O site, O(4) is bonded in a bent 120 degrees geometry to one Mn(1) and one P(2) atom. In the fourth O site, O(5) is bonded in a single-bond geometry to one Mn(1) atom. In the fifth O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Mn(1) and one P(1) atom.