Materials Data on KMnO2 by Materials Project

KMnO2 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. K1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of K–O bond distances ranging from 2.62–3.14 Å. Mn3+ is bonded to four O2- atoms to form a mixture of edge and corner-sharing MnO4 tetrahedra. There are a spread of Mn–O bond distances ranging from 1.91–1.98 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a rectangular see-saw-like geometry to two equivalent K1+ and two equivalent Mn3+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to four equivalent K1+ and two equivalent Mn3+ atoms.