Materials Data on CsK2NbF6 by Materials Project
CsK2NbF6 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Cs1+ is bonded to six equivalent F1- atoms to form CsF6 octahedra that share corners with six equivalent NbF6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Cs–F bond lengths are 2.77 Å. K1+ is bonded in a 12-coordinate geometry to twelve equivalent F1- atoms. All K–F bond lengths are 3.47 Å. Nb3+ is bonded to six equivalent F1- atoms to form NbF6 octahedra that share corners with six equivalent CsF6 octahedra. The corner-sharing octahedral tilt angles are 0°. All Nb–F bond lengths are 2.10 Å. F1- is bonded in a distorted linear geometry to one Cs1+, four equivalent K1+, and one Nb3+ atom.
36 MATERIALS SCIENCE↗