Description:
AbstractThe kinetics of crystallisation of ZnC2O4 · 2 H2O was investigated at 25°C and at different supersaturations. Zinc oxalate was prepared from pure zinc sulphate and oxalic acid solutions. The specific surface energy at the crystal‐solution interface was calculated from the induction period and the Volmer relationship, while the critical nuclei dimension was found by means of the Thomson‐Gibbs equation. With the decrease in supersaturation the size of the nuclei does not increase to infinity, but changes by 1–2 unit cells within a given supersaturation range.