Evidence of dynamical local scale distribution heterogeneities in CsF-AF (AÂ =Â Li, Na, K and Rb) molten salts

The local structure of molten CsF-AF (A = Li, Na, K and Rb) has been studied by high temperature Nuclear Magnetic Resonance (NMR) spectroscopy. The 19F and 133Cs chemical versus the molar fraction of CsF presents an anomaly in the series of the alkaline. The evolutions of 19F and 133Cs chemical shifts versus CsF-AF composition have been interpreted as a signature of dynamical local scale distribution heterogeneities.