Overall, 𝜏 SAE -1 of the isotopic compounds 6 Li10SnP2S12 and 7 Li10SnP2S12 exhibits a similar temperature dependence (top panel of Figure ). There are, however, important differences that indicate that ion transport depends on the isotope. The lower overall magnitude of 𝜏 SAE -1 for the Li compounds suggests Li + diffusion is generally faster than in the Li compound. An alternate explanation for the lower 𝜏 SAE -1 may be from the different quadrupolar coupling of the different isotopes. However, the observed temperature shift of the maximum 𝜏 SAE -1 value from ~155 K for diffusion in the channels to affect the apparent 𝜏 SAE values of Li.