Ion mobility was considered with regard to a unified site relaxation model which combined the key features of earlier dynamic structure and jump relaxation models. It was noted that other mobile cations, and the glass network, were both involved in site relaxation processes. The overall effect was partially to re-couple the movements of ions to structural relaxation processes. Such re-coupling was reflected by mechanical loss spectra and by the behavior of ion-exchanged and melt-quenched glasses.

J.E.Davidson, M.D.Ingram, A.Bunde, K.Funke: Journal of Non-Crystalline Solids, 1996, 203, 246-51