K3MnO3 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(3) atoms. In the second K site, K(2) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(3) atoms. In the third K site, K(3) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. Mn(1) is bonded in a distorted see-saw-like geometry to one O(2), one O(3), and two equivalent O(1) atoms. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one K(1), one K(2), two equivalent K(3), and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a 6-coordinate geometry to one K(3), two equivalent K(1), two equivalent K(2), and one Mn(1) atom. In the third O site, O(3) is bonded to two equivalent K(1), two equivalent K(2), two equivalent K(3), and one Mn(1) atom to form distorted edge-sharing OK6Mn pentagonal bipyramids.
K3MnO3 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent K sites. In the first K site, K(1) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(3) atoms. The K(1)-O(1) bond length is 2.68 Å. There is one shorter (2.74 Å) and one longer (2.82 Å) K(1)-O(2) bond length. There is one shorter (2.71 Å) and one longer (2.76 Å) K(1)-O(3) bond length. In the second K site, K(2) is bonded in a 5-coordinate geometry to one O(1), two equivalent O(2), and two equivalent O(3) atoms. The K(2)-O(1) bond length is 2.89 Å. There is one shorter (2.69 Å) and one longer (2.72 Å) K(2)-O(2) bond length. There is one shorter (2.60 Å) and one longer (2.77 Å) K(2)-O(3) bond length. In the third K site, K(3) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(1), and two equivalent O(3) atoms. The K(3)-O(2) bond length is 2.65 Å. There is one shorter (2.65 Å) and one longer (2.79 Å) K(3)-O(1) bond length. There is one shorter (2.81 Å) and one longer (2.87 Å) K(3)-O(3) bond length. Mn(1) is bonded in a distorted see-saw-like geometry to one O(2), one O(3), and two equivalent O(1) atoms. The Mn(1)-O(2) bond length is 1.85 Å. The Mn(1)-O(3) bond length is 1.84 Å. There is one shorter (1.94 Å) and one longer (1.95 Å) Mn(1)-O(1) bond length. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one K(1), one K(2), two equivalent K(3), and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a 6-coordinate geometry to one K(3), two equivalent K(1), two equivalent K(2), and one Mn(1) atom. In the third O site, O(3) is bonded to two equivalent K(1), two equivalent K(2), two equivalent K(3), and one Mn(1) atom to form distorted edge-sharing OK6Mn pentagonal bipyramids.