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Measurement of the Capillary Length for the Dendritic Growth of Ammonium Chloride

By Andrew Dougherty

Abstract

We report the results of a new method of measuring the capillary length for the dendritic crystal growth of non-faceted materials. This method uses a nearly spherical crystal held near unstable equilibrium in an oscillating temperature field. For the growth of ammonium chloride crystals from aqueous solution, previous published estimates of the capillary length varied by over a factor of 20. With this new method, we find the product of the diffusion constant and capillary length $D d_0$ to be $0.78 \pm 0.07 \,\mathrm{\mu m^3/s}$, similar to that obtained for ammonium bromide crystals.Comment: 4 pages, 2 figures. Submitted to Journal of Crystal Growt

Topics: Condensed Matter - Materials Science, Nonlinear Sciences - Pattern Formation and Solitons
Publisher: 'Elsevier BV'
Year: 2018
DOI identifier: 10.1016/j.jcrysgro.2018.10.025
OAI identifier: oai:arXiv.org:1206.4030

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