The purpose of this study was to investigate contact nucleation for various types of crystalline materials. Selected were aqueous solutions of two hydrated inorganic salts (MgSO4 · 7H2O and KAl(SO4)2 · 12H2O), one nonhydrated inorganic salt (K2SO4) and one organic substance (citric acid). Nucleation data were determined as number of nuclei generated per contact as a function of supersaturation and impact energy. Both of these variables strongly influenced the number of nuclei generated per contact. These data show that crystal growth and contact nucleation are related, with more rapidly growing substances giving higher yields of nuclei.
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Tai et al. (1975) studied this question.
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