Relation between morphology, growth kinetics, and quality of sodium chlorate crystals grown from pure and sodium-dithionate-doped solutions

Krzysztof Wojciechowski

doi:10.1117/12.224940

16 October 1995 Relation between morphology, growth kinetics, and quality of sodium chlorate crystals grown from pure and sodium-dithionate-doped solutions

Krzysztof Wojciechowski

Author Affiliations +

Proceedings Volume 2373, Solid State Crystals: Materials Science and Applications; (1995) https://doi.org/10.1117/12.224940
Event: Solid State Crystals: Materials Science and Applications, 1994, Zakopane, Poland

Abstract

Morphology of as-grown crystals of sodium chlorate obtained from pure solution has been interrelated with growth conditions. Crystals prepared at high cooling rates and supersaturations exhibit pure cubic {100} form. Crystal habit was modified by additional faces of {110} type at decreasing cooling rate and finally a new set of four crystallographically equivalent {111} faces was formed at a very low cooling rate. Surface features of all those types of the faces revealed the layer growth mechanism. Lang topography confirmed the presence of screw dislocations in all sectors under investigation, however, their density and structure is different for low and high cooling rates. Further investigations pointed out that four tetrahedral (111) faces present in the growth form are alternate to those observed in crystals grown from pure solution. X-ray analysis and liquid chromatography analysis of sulphur content confirmed the hypothesis that the impurity was built-in (111) growth sector. Therefore, further analysis of a possible surface site for impurity on these faces was performed and the hypothesis of the stability of these faces is discussed.

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Krzysztof Wojciechowski "Relation between morphology, growth kinetics, and quality of sodium chlorate crystals grown from pure and sodium-dithionate-doped solutions", Proc. SPIE 2373, Solid State Crystals: Materials Science and Applications, (16 October 1995); https://doi.org/10.1117/12.224940

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