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Spontaneous crystallization of potassium chloride from aqueous and aqueous‐ethanol solutions Part 2: Mechanism of aggregation and coalescence of crystals
Author(s) -
Linnikov Oleg D.
Publication year - 2004
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200310221
Subject(s) - supersaturation , chemistry , aqueous solution , crystallization , potassium , coagulation , coalescence (physics) , kinetics , colloid , chloride , chemical engineering , inorganic chemistry , organic chemistry , psychology , physics , quantum mechanics , psychiatry , astrobiology , engineering
Published data on aggregation kinetics of potassium chloride crystals at its spontaneous crystallization from supersaturated aqueous and aqueous‐ethanol solutions were analysed. It was found that the crystals coalesced through contact nucleus‐bridges according to the mechanism proposed by Polak. The kinetics of aggregation were described by the Smoluchowski equation for coagulation of colloidal particles. The kinetic coefficient of aggregation process depended on supersaturation, temperature of solution and other characteristics of system. The specific surface energy of potassium chloride 0.98 mJ/m 2 was found. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)