Abstract
The RT precipitation kinetics have been studied for the metastable phase in NaCl:Pb 2+ crystals by precise density measurements. The results obtained seem to be unaccountable in terms of the diffusion-controlled growth of constant or increasing number of particles. The observed process is concluded to be a coalescence (Ostwald ripening). At the late stage the experimental data fit the t − 1 3 law for solute depletion predicted by the asymptotic coalescence theory of Lifshitz and Slezov. A diffusion coefficient of Pb 2+ in the NaCl lattice and the particle size have been estimated by using the theory.
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