KMnPH2O5 crystallizes in the monoclinic Pm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms. In the second K site, K(2) is bonded in a 8-coordinate geometry to one O(2), one O(3), two equivalent O(5), two equivalent O(6), and two equivalent O(8) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(4), two equivalent O(7), and two equivalent O(8) atoms to form MnO6 octahedra that share corners with four equivalent Mn(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 64°. In the second Mn site, Mn(2) is bonded to one O(2), one O(3), two equivalent O(7), and two equivalent O(8) atoms to form MnO6 octahedra that share corners with four equivalent Mn(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 64°. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(4), one O(6), and two equivalent O(8) atoms to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-54°. In the second P site, P(2) is bonded to one O(3), one O(5), and two equivalent O(7) atoms to form PO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra, and  an edgeedge with one Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-54°. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. In the second H site, H(2) is bonded in a single-bond geometry to one O(2) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one K(1), one Mn(1), and two equivalent H(1) atoms. In the second O site, O(2) is bonded in a distorted water-like geometry to one K(2), one Mn(2), and two equivalent H(2) atoms. In the third O site, O(3) is bonded in a 2-coordinate geometry to one K(2), one Mn(2), and one P(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one K(1), one Mn(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent K(1), two equivalent K(2), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent K(1), two equivalent K(2), and one P(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one K(1), one Mn(1), one Mn(2), and one P(2) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one K(2), one Mn(1), one Mn(2), and one P(1) atom.
KMnPH2O5 crystallizes in the monoclinic Pm space group. There are two inequivalent K sites. In the first K site, K(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms. The K(1)-O(1) bond length is 3.00 Å. The K(1)-O(4) bond length is 3.09 Å. Both K(1)-O(5) bond lengths are 2.94 Å. There is one shorter (2.69 Å) and one longer (2.78 Å) K(1)-O(6) bond length. Both K(1)-O(7) bond lengths are 3.27 Å. In the second K site, K(2) is bonded in a 8-coordinate geometry to one O(2), one O(3), two equivalent O(5), two equivalent O(6), and two equivalent O(8) atoms. The K(2)-O(2) bond length is 3.00 Å. The K(2)-O(3) bond length is 3.11 Å. There is one shorter (2.69 Å) and one longer (2.78 Å) K(2)-O(5) bond length. Both K(2)-O(6) bond lengths are 2.94 Å. Both K(2)-O(8) bond lengths are 3.27 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to one O(1), one O(4), two equivalent O(7), and two equivalent O(8) atoms to form MnO6 octahedra that share corners with four equivalent Mn(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and  an edgeedge with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 64°. The Mn(1)-O(1) bond length is 2.30 Å. The Mn(1)-O(4) bond length is 2.13 Å. Both Mn(1)-O(7) bond lengths are 2.16 Å. Both Mn(1)-O(8) bond lengths are 2.31 Å. In the second Mn site, Mn(2) is bonded to one O(2), one O(3), two equivalent O(7), and two equivalent O(8) atoms to form MnO6 octahedra that share corners with four equivalent Mn(1)O6 octahedra,  a cornercorner with one P(2)O4 tetrahedra, corners with two equivalent P(1)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 64°. The Mn(2)-O(2) bond length is 2.30 Å. The Mn(2)-O(3) bond length is 2.13 Å. Both Mn(2)-O(7) bond lengths are 2.32 Å. Both Mn(2)-O(8) bond lengths are 2.16 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(4), one O(6), and two equivalent O(8) atoms to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra, corners with two equivalent Mn(2)O6 octahedra, and  an edgeedge with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-54°. The P(1)-O(4) bond length is 1.54 Å. The P(1)-O(6) bond length is 1.53 Å. Both P(1)-O(8) bond lengths are 1.59 Å. In the second P site, P(2) is bonded to one O(3), one O(5), and two equivalent O(7) atoms to form PO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra, corners with two equivalent Mn(1)O6 octahedra, and  an edgeedge with one Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 41-54°. The P(2)-O(3) bond length is 1.54 Å. The P(2)-O(5) bond length is 1.53 Å. Both P(2)-O(7) bond lengths are 1.59 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(1) atom. The H(1)-O(1) bond length is 0.99 Å. In the second H site, H(2) is bonded in a single-bond geometry to one O(2) atom. The H(2)-O(2) bond length is 0.99 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted water-like geometry to one K(1), one Mn(1), and two equivalent H(1) atoms. In the second O site, O(2) is bonded in a distorted water-like geometry to one K(2), one Mn(2), and two equivalent H(2) atoms. In the third O site, O(3) is bonded in a 2-coordinate geometry to one K(2), one Mn(2), and one P(2) atom. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to one K(1), one Mn(1), and one P(1) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent K(1), two equivalent K(2), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted single-bond geometry to two equivalent K(1), two equivalent K(2), and one P(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one K(1), one Mn(1), one Mn(2), and one P(2) atom. In the eighth O site, O(8) is bonded in a 3-coordinate geometry to one K(2), one Mn(1), one Mn(2), and one P(1) atom.