These values correspond remarkably well with values reported in ref. , who found 1.5 mS/cm for undoped Li3InCl6 and a maximum value of 2.1 mS/cm also at 30% Zr content. The conductivities found in ref. are lower, with a maximum of 1.2 mS/cm found at 40% Zr content. . Errors in the activation energy errors are determined from the linear fit and given in the SI Table .