where 𝑎 is the average jump distance taken as 2.7 Å which is the average distance between Li sites in LNCl and f is the correlation factor; the correlation factor is a measure for how efficiently jumps contribute to macroscopic diffusion and can be calculated from the ratio Dtr /DJ. From the extrapolated values of Dtr and DJ at 300 K we obtained a correlation factor f=0.06.