KMnO2 crystallizes in the monoclinic C2/m space group. K(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. Mn(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form a mixture of edge and corner-sharing MnO4 tetrahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent K(1) and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a 2-coordinate geometry to four equivalent K(1) and two equivalent Mn(1) atoms.
KMnO2 crystallizes in the monoclinic C2/m space group. K(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. Both K(1)-O(1) bond lengths are 2.62 Å. There are two shorter (2.84 Å) and two longer (3.14 Å) K(1)-O(2) bond lengths. Mn(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form a mixture of edge and corner-sharing MnO4 tetrahedra. There is one shorter (1.91 Å) and one longer (1.93 Å) Mn(1)-O(1) bond length. Both Mn(1)-O(2) bond lengths are 1.98 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a rectangular see-saw-like geometry to two equivalent K(1) and two equivalent Mn(1) atoms. In the second O site, O(2) is bonded in a 2-coordinate geometry to four equivalent K(1) and two equivalent Mn(1) atoms.