An empirical model to calculate 19F isotropic chemical shifts in alkali-hexafluoroaluminates

Using an empirical model based on alkali-metal Al-cryolites MI3AlF6, it is possible to deduce factors describing the cationic influence of each alkali-metal on the isotropic 19F MAS NMR chemical shift and thus to predict the chemical shift values of alkali-metal hexafluoroaluminates of the elpasolite-type AI2BIAlF6.