The dynamics of both ionic and orientational defects in hydrogen halides were studied in terms of multi-component soliton models. The mobility of positive ionic defects was demonstrated to, in effect, exceed the mobility of the negative ionic defects. The positive orientational defects were shown to be immobile, while the negative orientational defects were mobile.

A.V.Savin, A.V.Zolotaryuk: Solid State Ionics, 1995, 77, 15-9