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Slope ratios of differential thermal curves of dickite

Published online by Cambridge University Press:  14 March 2018

R. J. W. Mclaughlin*
Affiliation:
Geology Department, University of Melbourne, Australia
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Abstract

The relationships between the shapes of kaolinite and dickite differential thermal curves are described. The slope ratios of dickite are distinctly greater than those of kaolinite of equivalent particle size for the endothermic peak at about 550ºC and the same effect is observed for the exothermic peak at about 980ºC especially in diluted samples. The packing density of dickite does not differ markedly from that of kaolinite and the curve obtained for weight vs. area of the endothermic peak is in agreement with this. The dickite samples, however, give slightly lower areas than those of kaolinite, an effect that is dependent on the shape of the particles. The exothermic peak is shown to be influenced considerably in shape and size by thermal gradients.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1962

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References

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Kerr, P. F. (editor), 1951. Preliminary Reports: Reference Clay Minerals. American Petroleum Institute, Research Project 49.Google Scholar
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