Materials Data on NaMnO2 by Materials Project

Abstract

NaMnO2 is H-Phase structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Na1+ is bonded to six equivalent O2- atoms to form distorted NaO6 pentagonal pyramids that share corners with six equivalent MnO6 octahedra, edges with six equivalent MnO6 octahedra, and edges with six equivalent NaO6 pentagonal pyramids. The corner-sharing octahedral tilt angles are 12°. All Na–O bond lengths are 2.44 Å. Mn3+ is bonded to six equivalent O2- atoms to form MnO6 octahedra that share corners with six equivalent NaO6 pentagonal pyramids, edges with six equivalent MnO6 octahedra, and edges with six equivalent NaO6 pentagonal pyramids. All Mn–O bond lengths are 2.09 Å. O2- is bonded to three equivalent Na1+ and three equivalent Mn3+ atoms to form a mixture of edge, corner, and face-sharing ONa3Mn3 octahedra. The corner-sharing octahedra tilt angles range from 0–43°.