K2MgMn2P6(HO10)2 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(6), one O(9), and two equivalent O(7) atoms. Mg(1) is bonded in a square co-planar geometry to two equivalent O(3) and two equivalent O(8) atoms. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1), two equivalent O(3), two equivalent O(6), and two equivalent O(8) atoms to form distorted MnO8 hexagonal bipyramids that share corners with two equivalent P(2)O4 tetrahedra, edges with two equivalent P(1)O4 tetrahedra, and edges with two equivalent P(3)O4 tetrahedra. In the second Mn site, Mn(2) is bonded to two equivalent O(10), two equivalent O(5), and two equivalent O(7) atoms to form MnO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(3), one O(5), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra, and  an edgeedge with one Mn(1)O8 hexagonal bipyramid. The corner-sharing octahedral tilt angles are 35°. In the second P site, P(2) is bonded to one O(2), one O(4), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O8 hexagonal bipyramid,  a cornercorner with one Mn(2)O6 octahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. In the third P site, P(3) is bonded to one O(1), one O(10), one O(4), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and  an edgeedge with one Mn(1)O8 hexagonal bipyramid. The corner-sharing octahedral tilt angles are 54°. There are two inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to two equivalent O(2) atoms. In the second H site, H(2) is bonded in a linear geometry to two equivalent O(9) atoms. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mn(1), one P(1), and one P(3) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(2), and one H(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one P(2) and one P(3) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Mn(2) and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one K(1), one Mn(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to two equivalent K(1), one Mn(2), and one P(2) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Mg(1), one Mn(1), and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(1), and one H(2) atom. In the tenth O site, O(10) is bonded in a 2-coordinate geometry to one K(1), one Mn(2), and one P(3) atom.
K2MgMn2P6(HO10)2 crystallizes in the triclinic P-1 space group. K(1) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(6), one O(9), and two equivalent O(7) atoms. The K(1)-O(10) bond length is 3.04 Å. The K(1)-O(2) bond length is 2.62 Å. The K(1)-O(6) bond length is 3.09 Å. The K(1)-O(9) bond length is 2.89 Å. There is one shorter (2.65 Å) and one longer (2.93 Å) K(1)-O(7) bond length. Mg(1) is bonded in a square co-planar geometry to two equivalent O(3) and two equivalent O(8) atoms. Both Mg(1)-O(3) bond lengths are 1.96 Å. Both Mg(1)-O(8) bond lengths are 2.00 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1), two equivalent O(3), two equivalent O(6), and two equivalent O(8) atoms to form distorted MnO8 hexagonal bipyramids that share corners with two equivalent P(2)O4 tetrahedra, edges with two equivalent P(1)O4 tetrahedra, and edges with two equivalent P(3)O4 tetrahedra. Both Mn(1)-O(1) bond lengths are 2.41 Å. Both Mn(1)-O(3) bond lengths are 2.38 Å. Both Mn(1)-O(6) bond lengths are 2.09 Å. Both Mn(1)-O(8) bond lengths are 2.67 Å. In the second Mn site, Mn(2) is bonded to two equivalent O(10), two equivalent O(5), and two equivalent O(7) atoms to form MnO6 octahedra that share corners with two equivalent P(1)O4 tetrahedra, corners with two equivalent P(2)O4 tetrahedra, and corners with two equivalent P(3)O4 tetrahedra. Both Mn(2)-O(10) bond lengths are 2.19 Å. Both Mn(2)-O(5) bond lengths are 2.21 Å. Both Mn(2)-O(7) bond lengths are 2.19 Å. There are three inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(3), one O(5), and one O(9) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one P(3)O4 tetrahedra, and  an edgeedge with one Mn(1)O8 hexagonal bipyramid. The corner-sharing octahedral tilt angles are 35°. The P(1)-O(1) bond length is 1.65 Å. The P(1)-O(3) bond length is 1.55 Å. The P(1)-O(5) bond length is 1.49 Å. The P(1)-O(9) bond length is 1.54 Å. In the second P site, P(2) is bonded to one O(2), one O(4), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(1)O8 hexagonal bipyramid,  a cornercorner with one Mn(2)O6 octahedra, and  a cornercorner with one P(3)O4 tetrahedra. The corner-sharing octahedral tilt angles are 52°. The P(2)-O(2) bond length is 1.55 Å. The P(2)-O(4) bond length is 1.65 Å. The P(2)-O(6) bond length is 1.52 Å. The P(2)-O(7) bond length is 1.52 Å. In the third P site, P(3) is bonded to one O(1), one O(10), one O(4), and one O(8) atom to form PO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and  an edgeedge with one Mn(1)O8 hexagonal bipyramid. The corner-sharing octahedral tilt angles are 54°. The P(3)-O(1) bond length is 1.60 Å. The P(3)-O(10) bond length is 1.50 Å. The P(3)-O(4) bond length is 1.59 Å. The P(3)-O(8) bond length is 1.52 Å. There are two inequivalent H sites. In the first H site, H(1) is bonded in a linear geometry to two equivalent O(2) atoms. Both H(1)-O(2) bond lengths are 1.22 Å. In the second H site, H(2) is bonded in a linear geometry to two equivalent O(9) atoms. Both H(2)-O(9) bond lengths are 1.21 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mn(1), one P(1), and one P(3) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(2), and one H(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one Mn(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one P(2) and one P(3) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to one Mn(2) and one P(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one K(1), one Mn(1), and one P(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to two equivalent K(1), one Mn(2), and one P(2) atom. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Mg(1), one Mn(1), and one P(3) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one K(1), one P(1), and one H(2) atom. In the tenth O site, O(10) is bonded in a 2-coordinate geometry to one K(1), one Mn(2), and one P(3) atom.