ChemInform Abstract: Ab initio Structure Determination of the New Ion Conductor K₂Al₂O₃F₂ from Powder Diffraction Data.

Abstract

The title compound is prepared by reaction of Al(OH)3 and KF powders (Pt crucible, 800°C, 18 h; 96 wt.% yield). K2Al2O3F2 crystallizes in the monoclinic space group C2/m with Z = 4 (powder XRD). The crystal structure consists of individual layers of oxygen connected AlO3F tetrahedral groups with fluorine atoms separating the layers. Conductivity measurements from room temperature to 300°C show decent potassium ion conductivity. -(KUBEL*, F.; FLEIG, J.; PANTAZI, M.; JANUSCHEWSKY, J.; Z. Anorg. Allg. Chem. 637 (2011) 1, 41-45, http://dx.