To investigate to what extent the two processes contribute to the total diffusivity, the diffusion constant was calculated for the distinct hopping process, assuming an octahedraltetrahedral-octahedral (oct-tet-oct) diffusion path (see discussion below) with an average jump distance of 2.1Å (similar to the procedure in ref. ). The faster process (red line, Ea = 0.131 eV) (SI Table ) leads to a diffusion coefficient of ~10 -12 m 2 s -1 (SI Table ), which is the same order of magnitude as the diffusivity calculated from impedance measurements using the Nernst-Einstein relationship (SI table ). The slower process (black line, Ea=0.189 eV) leads to a diffusivity of the order ~10 -13 m 2 s -1 . Therefore, we can assume that the first jump process is the main contributor to macroscopic diffusion in Li3InCl6. .