MgMn2P2(H2O5)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(10), one O(2), one O(3), one O(6), and one O(8) atom to form distorted MgO6 pentagonal pyramids that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, edges with two equivalent Mn(2)O6 octahedra,  an edgeedge with one P(1)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 6-coordinate geometry to one H(2), one O(2), one O(4), one O(5), one O(7), and one O(9) atom. In the second Mn site, Mn(2) is bonded to one O(1), one O(10), one O(3), one O(6), one O(8), and one O(9) atom to form MnO6 octahedra that share  a cornercorner with one Mg(1)O6 pentagonal pyramid, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and edges with two equivalent Mg(1)O6 pentagonal pyramids. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Mn(2)O6 octahedra,  a cornercorner with one Mg(1)O6 pentagonal pyramid, and  an edgeedge with one Mg(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 40-60°. In the second P site, P(2) is bonded to one O(3), one O(4), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Mn(2)O6 octahedra and  an edgeedge with one Mg(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 48-60°. There are four inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(10) and one O(5) atom. In the second H site, H(2) is bonded in a single-bond geometry to one Mn(1) and one O(10) atom. In the third H site, H(3) is bonded in a linear geometry to one O(7) and one O(9) atom. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(8) and one O(9) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Mg(1), one Mn(2), and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(1), and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(2), and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Mn(1), one P(1), and one H(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(2), and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Mn(1), one P(2), and one H(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one Mn(2), one P(2), and one H(4) atom. In the ninth O site, O(9) is bonded in a distorted water-like geometry to one Mn(1), one Mn(2), one H(3), and one H(4) atom. In the tenth O site, O(10) is bonded in a 2-coordinate geometry to one Mg(1), one Mn(2), one H(1), and one H(2) atom.
MgMn2P2(H2O5)2 crystallizes in the triclinic P1 space group. Mg(1) is bonded to one O(1), one O(10), one O(2), one O(3), one O(6), and one O(8) atom to form distorted MgO6 pentagonal pyramids that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra, edges with two equivalent Mn(2)O6 octahedra,  an edgeedge with one P(1)O4 tetrahedra, and  an edgeedge with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 43°. The Mg(1)-O(1) bond length is 2.03 Å. The Mg(1)-O(10) bond length is 2.05 Å. The Mg(1)-O(2) bond length is 2.18 Å. The Mg(1)-O(3) bond length is 2.22 Å. The Mg(1)-O(6) bond length is 2.20 Å. The Mg(1)-O(8) bond length is 2.13 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded in a 6-coordinate geometry to one H(2), one O(2), one O(4), one O(5), one O(7), and one O(9) atom. The Mn(1)-H(2) bond length is 2.38 Å. The Mn(1)-O(2) bond length is 2.20 Å. The Mn(1)-O(4) bond length is 2.07 Å. The Mn(1)-O(5) bond length is 2.18 Å. The Mn(1)-O(7) bond length is 2.15 Å. The Mn(1)-O(9) bond length is 2.18 Å. In the second Mn site, Mn(2) is bonded to one O(1), one O(10), one O(3), one O(6), one O(8), and one O(9) atom to form MnO6 octahedra that share  a cornercorner with one Mg(1)O6 pentagonal pyramid, corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and edges with two equivalent Mg(1)O6 pentagonal pyramids. The Mn(2)-O(1) bond length is 2.25 Å. The Mn(2)-O(10) bond length is 2.30 Å. The Mn(2)-O(3) bond length is 2.10 Å. The Mn(2)-O(6) bond length is 2.25 Å. The Mn(2)-O(8) bond length is 2.28 Å. The Mn(2)-O(9) bond length is 2.30 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(5), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Mn(2)O6 octahedra,  a cornercorner with one Mg(1)O6 pentagonal pyramid, and  an edgeedge with one Mg(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 40-60°. The P(1)-O(1) bond length is 1.57 Å. The P(1)-O(2) bond length is 1.57 Å. The P(1)-O(5) bond length is 1.56 Å. The P(1)-O(6) bond length is 1.55 Å. In the second P site, P(2) is bonded to one O(3), one O(4), one O(7), and one O(8) atom to form PO4 tetrahedra that share corners with two equivalent Mn(2)O6 octahedra and  an edgeedge with one Mg(1)O6 pentagonal pyramid. The corner-sharing octahedral tilt angles range from 48-60°. The P(2)-O(3) bond length is 1.57 Å. The P(2)-O(4) bond length is 1.52 Å. The P(2)-O(7) bond length is 1.56 Å. The P(2)-O(8) bond length is 1.59 Å. There are four inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to one O(10) and one O(5) atom. The H(1)-O(10) bond length is 1.10 Å. The H(1)-O(5) bond length is 1.33 Å. In the second H site, H(2) is bonded in a single-bond geometry to one Mn(1) and one O(10) atom. The H(2)-O(10) bond length is 0.98 Å. In the third H site, H(3) is bonded in a linear geometry to one O(7) and one O(9) atom. The H(3)-O(7) bond length is 1.53 Å. The H(3)-O(9) bond length is 1.03 Å. In the fourth H site, H(4) is bonded in a single-bond geometry to one O(8) and one O(9) atom. The H(4)-O(8) bond length is 1.73 Å. The H(4)-O(9) bond length is 1.01 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Mg(1), one Mn(2), and one P(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(1), and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(2), and one P(2) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Mn(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Mn(1), one P(1), and one H(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(2), and one P(1) atom. In the seventh O site, O(7) is bonded in a distorted trigonal non-coplanar geometry to one Mn(1), one P(2), and one H(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal pyramidal geometry to one Mg(1), one Mn(2), one P(2), and one H(4) atom. In the ninth O site, O(9) is bonded in a distorted water-like geometry to one Mn(1), one Mn(2), one H(3), and one H(4) atom. In the tenth O site, O(10) is bonded in a 2-coordinate geometry to one Mg(1), one Mn(2), one H(1), and one H(2) atom.