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Influence of supersaturation on the kinetics of crystallisation of ZnC 2 O 4 · 2H 2 O
Author(s) -
Kirkova E.,
Djarova M.
Publication year - 1971
Publication title -
kristall und technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0023-4753
DOI - 10.1002/crat.19710060504
Subject(s) - supersaturation , crystallization , kinetics , oxalic acid , gibbs free energy , zinc , oxalate , chemistry , crystallography , crystal growth , thermodynamics , inorganic chemistry , physics , organic chemistry , quantum mechanics
Abstract The kinetics of crystallisation of ZnC 2 O 4 · 2 H 2 O 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.