Abstract
The diffusion-controlled relaxation model, originally proposed by Glarum for molecular liquids, is applied here to ionic transport in glasses. For the first time, the detailed frequency-dependent behaviour predicted by this model, when an exact treatment of the diffusion due to Bordewijk is employed, is discussed. It is shown that this theory is capable of explaining most aspects of the a.c. transport in ionically conducting glasses without arbitrarily assuming the existence of a distribution of relaxation times.