Abstract
Positron annihilation has been applied to study a series of non-stoichiometric pollucite samples with the composition Cs(1−x)Al(1−x)Si(2+x)O6 for x = 0.0–0.25. Lifetime results showed a monotonic increase in the o-Ps lifetime and intensity as the Cs concentration was reduced. This is consistent with literature suppositions that vacancies are created as the Cs content is reduced.
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