Abstract

Agglomerates of potassium chloride crystals grown in the presence of lead ions were studied by SEM and by sieve analysis. Spherulites grown in industrial crystallizers have characteristics of agglomerates, as was shown by SEM studies of their cross sections. The assembling of spherulites with hard core and attached peripherial crystallites was achieved in laboratory experiments with non-linear programmed cooling. An attempt was made to relate the variation of the internal structure of spherulites obtained industrially to the cyclic behaviour of supersaturation levels in crystallizers.

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