Materials Data on NaMn3O6 by Materials Project

Abstract

NaMn3O6 is beta indium sulfide-derived structured and crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Na1+ is bonded to four O2- atoms to form NaO4 tetrahedra that share corners with twelve MnO6 octahedra. The corner-sharing octahedra tilt angles range from 55–68°. There are two shorter (2.15 Å) and two longer (2.20 Å) Na–O bond lengths. There are four inequivalent Mn+3.67+ sites. In the first Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with four equivalent NaO4 tetrahedra and edges with six MnO6 octahedra. There are a spread of Mn–O bond distances ranging from 1.92–2.00 Å. In the second Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form MnO6 octahedra that share corners with four equivalent NaO4 tetrahedra and edges with six MnO6 octahedra. There are a spread of Mn–O bond distances ranging from 1.91–2.01 Å. In the third Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form distorted MnO6 octahedra that share corners with four equivalent NaO4 tetrahedra and edges with six MnO6 octahedra. There are a spread of Mn–O bond distances ranging from 1.95–2.21 Å. In the fourth Mn+3.67+ site, Mn+3.67+ is bonded to six O2- atoms to form distorted MnO6 octahedra that share corners with four equivalent NaO4 tetrahedra and edges with six MnO6 octahedra. There are a spread of Mn–O bond distances ranging from 1.95–2.25 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded to one Na1+ and three Mn+3.67+ atoms to form a mixture of distorted corner and edge-sharing ONaMn3 tetrahedra. In the second O2- site, O2- is bonded to one Na1+ and three Mn+3.67+ atoms to form a mixture of distorted corner and edge-sharing ONaMn3 tetrahedra. In the third O2- site, O2- is bonded in a 3-coordinate geometry to three Mn+3.67+ atoms. In the fourth O2- site, O2- is bonded in a 3-coordinate geometry to three Mn+3.67+ atoms. In the fifth O2- site, O2- is bonded to one Na1+ and three Mn+3.67+ atoms to form a mixture of distorted corner and edge-sharing ONaMn3 tetrahedra. In the sixth O2- site, O2- is bonded to one Na1+ and three Mn+3.67+ atoms to form a mixture of corner and edge-sharing ONaMn3 tetrahedra.