Abstract
The effect of the aliovalent cation dopants on the ionic conduction characteristics of the polycrystalline lead fluoride was studied in the temperature range between 25° and 350°C in order to determine the predominate mobile species in both and . It was found that the activation energy of motion was for and for. Doping with did not result in a change in the value of the activation energy for either or . However, the activation energy of motion for the was and that for the was . It was concluded from these results that Frenkel disorder is predominate in the lead fluoride lattice. The interstitial fluoride ions are the principal mobile species in the nominally pure as well as the and the fluoride ion vacancies are the principal mobile species in the .
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