Materials Data on K2Mn2O3 by Materials Project

Abstract

K2Mn2O3 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. K1+ is bonded in a 4-coordinate geometry to four O2- atoms. There are a spread of K–O bond distances ranging from 2.69–2.84 Å. Mn2+ 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 2.05–2.16 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to four equivalent K1+ and two equivalent Mn2+ atoms to form corner-sharing OK4Mn2 octahedra. The corner-sharing octahedral tilt angles are 63°. In the second O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent K1+ and three equivalent Mn2+ atoms.