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Optical imaging of the growth kinetics and polar morphology of zinc tris(thiourea) sulphate single crystals

✍ Scribed by S. Dinakaran; S. Verma; S. Jerome Das; S. Kar; K. S. Bartwal

Publisher: John Wiley and Sons
Year: 2010
Tongue: English
Weight: 293 KB
Volume: 45
Category: Article
ISSN: 0232-1300
DOI: 10.1002/crat.200900555

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✦ Synopsis

Abstract

Growth kinetics of zinc tris(thiourea) sulphate (ZTS) single crystals was imaged in two different growth geometries using laser shadowgraphy technique. Growth rates of the {010} and {001} faces were computed as a function of supersaturation. The time evolution of polar morphology of ZTS crystal based on the growth rates is presented. Except (00$ \bar 1 $) face, all the other three faces are found to have a dead zone resulting in large induction period of growth. The anisotropy in the growth rates of the (001) and (00$ \bar 1 $) faces was very high, resulting in polar morphology. Different chemical environments on two sides of the (001) slice are suggested as the possible cause for the polar morphology of the crystals. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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