Materials Data on CsCoNiF6 by Materials Project

Abstract

CsCoNiF6 crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Cs1+ is bonded to six F1- atoms to form CsF6 octahedra that share corners with six equivalent CoF6 octahedra and corners with six equivalent NiF6 octahedra. The corner-sharing octahedra tilt angles range from 67–70°. There are a spread of Cs–F bond distances ranging from 3.11–3.21 Å. Co3+ is bonded to six F1- atoms to form CoF6 octahedra that share corners with two equivalent CoF6 octahedra, corners with four equivalent NiF6 octahedra, and corners with six equivalent CsF6 octahedra. The corner-sharing octahedra tilt angles range from 42–69°. There is four shorter (1.91 Å) and two longer (1.98 Å) Co–F bond length. Ni2+ is bonded to six F1- atoms to form NiF6 octahedra that share corners with two equivalent NiF6 octahedra, corners with four equivalent CoF6 octahedra, and corners with six equivalent CsF6 octahedra. The corner-sharing octahedra tilt angles range from 43–70°. There are two shorter (1.99 Å) and four longer (2.06 Å) Ni–F bond lengths. There are three inequivalent F1- sites. In the first F1- site, F1- is bonded in a 2-coordinate geometry to one Cs1+ and two equivalent Co3+ atoms. In the second F1- site, F1- is bonded in a 3-coordinate geometry to one Cs1+ and two equivalent Ni2+ atoms. In the third F1- site, F1- is bonded in a 2-coordinate geometry to one Cs1+, one Co3+, and one Ni2+ atom.