Materials Data on Na2MnCoNiO6 by Materials Project

Abstract

Na2MnCoNiO6 crystallizes in the triclinic P1 space group. The structure is three-dimensional. there are two inequivalent Na1+ sites. In the first Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.31–2.56 Å. In the second Na1+ site, Na1+ is bonded in a 6-coordinate geometry to six O2- atoms. There are a spread of Na–O bond distances ranging from 2.36–2.62 Å. Mn2+ is bonded to six O2- atoms to form MnO6 octahedra that share edges with two equivalent MnO6 octahedra, edges with two equivalent CoO6 octahedra, and edges with two equivalent NiO6 octahedra. There are a spread of Mn–O bond distances ranging from 1.93–1.97 Å. Co4+ is bonded to six O2- atoms to form CoO6 octahedra that share edges with two equivalent MnO6 octahedra, edges with two equivalent CoO6 octahedra, and edges with two equivalent NiO6 octahedra. There are a spread of Co–O bond distances ranging from 1.94–2.12 Å. Ni4+ is bonded to six O2- atoms to form NiO6 octahedra that share edges with two equivalent MnO6 octahedra, edges with two equivalent CoO6 octahedra, and edges with two equivalent NiO6 octahedra. There are a spread of Ni–O bond distances ranging from 1.94–2.13 Å. There are six inequivalent O2- sites. In the first O2- site, O2- is bonded to two Na1+, one Mn2+, and two equivalent Ni4+ atoms to form distorted ONa2MnNi2 trigonal bipyramids that share corners with four equivalent ONa2CoNi2 square pyramids, corners with three ONa2MnCo2 trigonal bipyramids, edges with three ONa2Co2Ni square pyramids, and edges with three ONa2Mn2Co trigonal bipyramids. In the second O2- site, O2- is bonded to two equivalent Na1+, two equivalent Co4+, and one Ni4+ atom to form ONa2Co2Ni square pyramids that share corners with six ONa2MnCo2 trigonal bipyramids, edges with four ONa2Co2Ni square pyramids, and edges with three ONa2MnNi2 trigonal bipyramids. In the third O2- site, O2- is bonded to two equivalent Na1+, two equivalent Mn2+, and one Co4+ atom to form distorted ONa2Mn2Co trigonal bipyramids that share corners with five ONa2CoNi2 square pyramids, corners with two equivalent ONa2MnCo2 trigonal bipyramids, an edgeedge with one ONa2CoNi2 square pyramid, and edges with six ONa2MnNi2 trigonal bipyramids. In the fourth O2- site, O2- is bonded to two Na1+, one Mn2+, and two equivalent Co4+ atoms to form distorted ONa2MnCo2 trigonal bipyramids that share corners with four equivalent ONa2Co2Ni square pyramids, corners with five ONa2MnCo2 trigonal bipyramids, edges with three ONa2Co2Ni square pyramids, and edges with three ONa2MnNi2 trigonal bipyramids. In the fifth O2- site, O2- is bonded in a 5-coordinate geometry to two equivalent Na1+, two equivalent Mn2+, and one Ni4+ atom. In the sixth O2- site, O2- is bonded to two equivalent Na1+, one Co4+, and two equivalent Ni4+ atoms to form ONa2CoNi2 square pyramids that share corners with seven ONa2MnNi2 trigonal bipyramids, edges with four ONa2Co2Ni square pyramids, and edges with four ONa2MnNi2 trigonal bipyramids.