K2Mn(SO6)2 crystallizes in the monoclinic C2/m space group. K(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(3), two equivalent O(8), and two equivalent O(9) atoms to form MnO6 octahedra that share corners with two equivalent S(1)O4 tetrahedra. In the second Mn site, Mn(2) is bonded to two equivalent O(5) and four equivalent O(7) atoms to form MnO6 octahedra that share corners with two equivalent S(2)O4 tetrahedra. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(3), one O(4), and two equivalent O(1) atoms to form SO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles are 22°. In the second S site, S(2) is bonded to one O(5), one O(6), and two equivalent O(2) atoms to form SO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles are 45°. There are nine inequivalent O sites. In the first O site, O(5) is bonded in a 2-coordinate geometry to two equivalent K(1), one Mn(2), and one S(2) atom. In the second O site, O(6) is bonded in a distorted single-bond geometry to two equivalent K(1) and one S(2) atom. In the third O site, O(7) is bonded in a distorted single-bond geometry to one K(1) and one Mn(2) atom. In the fourth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Mn(1) atom. In the fifth O site, O(9) is bonded in a single-bond geometry to two equivalent K(1) and one Mn(1) atom. In the sixth O site, O(1) is bonded in a distorted single-bond geometry to one K(1) and one S(1) atom. In the seventh O site, O(2) is bonded in a distorted single-bond geometry to one K(1) and one S(2) atom. In the eighth O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent K(1), one Mn(1), and one S(1) atom. In the ninth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent K(1) and one S(1) atom.
K2Mn(SO6)2 crystallizes in the monoclinic C2/m space group. K(1) is bonded in a 9-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), one O(8), and one O(9) atom. The K(1)-O(1) bond length is 2.89 Å. The K(1)-O(2) bond length is 2.89 Å. The K(1)-O(3) bond length is 3.21 Å. The K(1)-O(4) bond length is 2.92 Å. The K(1)-O(5) bond length is 3.10 Å. The K(1)-O(6) bond length is 2.98 Å. The K(1)-O(7) bond length is 2.93 Å. The K(1)-O(8) bond length is 3.00 Å. The K(1)-O(9) bond length is 3.32 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(3), two equivalent O(8), and two equivalent O(9) atoms to form MnO6 octahedra that share corners with two equivalent S(1)O4 tetrahedra. Both Mn(1)-O(3) bond lengths are 1.89 Å. Both Mn(1)-O(8) bond lengths are 1.87 Å. Both Mn(1)-O(9) bond lengths are 1.88 Å. In the second Mn site, Mn(2) is bonded to two equivalent O(5) and four equivalent O(7) atoms to form MnO6 octahedra that share corners with two equivalent S(2)O4 tetrahedra. Both Mn(2)-O(5) bond lengths are 1.98 Å. All Mn(2)-O(7) bond lengths are 1.84 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded to one O(3), one O(4), and two equivalent O(1) atoms to form SO4 tetrahedra that share  a cornercorner with one Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles are 22°. The S(1)-O(3) bond length is 1.58 Å. The S(1)-O(4) bond length is 1.47 Å. Both S(1)-O(1) bond lengths are 1.47 Å. In the second S site, S(2) is bonded to one O(5), one O(6), and two equivalent O(2) atoms to form SO4 tetrahedra that share  a cornercorner with one Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles are 45°. The S(2)-O(5) bond length is 1.56 Å. The S(2)-O(6) bond length is 1.47 Å. Both S(2)-O(2) bond lengths are 1.47 Å. There are nine inequivalent O sites. In the first O site, O(5) is bonded in a 2-coordinate geometry to two equivalent K(1), one Mn(2), and one S(2) atom. In the second O site, O(6) is bonded in a distorted single-bond geometry to two equivalent K(1) and one S(2) atom. In the third O site, O(7) is bonded in a distorted single-bond geometry to one K(1) and one Mn(2) atom. In the fourth O site, O(8) is bonded in a distorted single-bond geometry to two equivalent K(1) and one Mn(1) atom. In the fifth O site, O(9) is bonded in a single-bond geometry to two equivalent K(1) and one Mn(1) atom. In the sixth O site, O(1) is bonded in a distorted single-bond geometry to one K(1) and one S(1) atom. In the seventh O site, O(2) is bonded in a distorted single-bond geometry to one K(1) and one S(2) atom. In the eighth O site, O(3) is bonded in a bent 150 degrees geometry to two equivalent K(1), one Mn(1), and one S(1) atom. In the ninth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent K(1) and one S(1) atom.