Also, the previous work on the molybdates as well as other solid-state In summary, this study highlights the potential for multinuclear variable-temperature solidstate NMR, with its specificity for different nuclei as well as sensitivity to local dynamics, to provide unique insights into the underlying mechanisms driving bulk ionic conduction in superionic conductors. In turn, these mechanisms suggest design rules that can be utilised in future work to optimise the next generation of ionic conducting materials with the ultimate goal of rational materials design.