High resolution nuclear magnetic resonance study of the mobility in solid cryolite, Na

This work describes the temperature evolution of 27Al, 23Na and 19F MAS spectra in solid cryolite (Na3AlF6), from room temperature up to 300 °C. The description of ionic mobility in the solid is derived from chemical shifts and line-widths evolution for each nucleus with temperature. Exchange two-dimensional experiments on 23Na directly detect Na mobility and equilibrium constants can be measured