Surface Features of Alkali Halide Crystals Pulled from the Melt

Autor:	K. A. McCarthy, J. L. Sampson
Rok vydání:	1963
Předmět:	Thermal equilibrium Crystal Chemistry Chemical physics Thermal Inorganic chemistry General Physics and Astronomy Non-equilibrium thermodynamics Meniscus Halide Crystal growth Alkali metal
Zdroj:	Journal of Applied Physics. 34:142-143
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.1729055
Popis:	An examination of sodium chloride and potassium chloride single crystals pulled from the melt by a method based on that of Czochralski reveals facets, stepped surfaces, and ridges on the surfaces of the crystals. By growing crystals of various axial orientations under different conditions, an empirical rule has been formulated and tested. This rule predicts the occurrence of the three types of surfaces. It is shown that facets, which appear to result from growth under conditions of thermal equilibrium, can occur when the major portion of the crystal is growing under nonequilibrium conditions. An explanation in terms of forces associated with the meniscus and of thermal effects is proposed. Photographs of three crystals are included.
Databáze:	OpenAIRE
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