Abstract
The present work demonstrates that the formation of clearly defined rhythmicity is intimately related to the stability of the sol prior to precipitation. The various factors affecting this stability have been analyzed for their effect on the periodicity. It is shown that excess silver ion causes rapid flocculation and blurred precipitation zones. On the other hand, the spacing coefficient is shown to increase in the presence of peptizers for the precipitated substance. The periodicity observed in gels may be used as a method for investigating the stability of colloidal sols.
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