Transport numbers in pure fused zinc chloride

Using radioactive tracers, the transport numbers have 5 been measured for both the cation and anion in molten zinc chloride. Due to non-ideal conditions, there was a pronounced tendency for the experiments to give too low values for t+ and t-. This tendency became stronger as the current density increased in the cell. An extrapolation to zero current gives t+ = 0.6 + 0.1. There was no detectable temperature influence on the transport number in the region from 420°C to close to the boiling point, while measurements in the region below 420°C were uncertain due to the growth of dendrites of deposited zinc metal. No current transport by complex ions could be detected