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Transformation of minerals of the montmorillonite family into 10 Å. micas1

Published online by Cambridge University Press:  14 March 2018

S. Caillère  and
S. Hénin
S. Caillère
Affiliation:
Muséum National d'Histoire Naturelle, Paris. Laboratoire des Sols, Versailles
S. Hénin
Affiliation:
Muséum National d'Histoire Naturelle, Paris. Laboratoire des Sols, Versailles
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Extract

In his work on the mineralogy of soils colloids G. Nagelschmidt, suggests the possibility of a reversible change of the type

montmorillonite ⇋ illite ⇋ muscovite.

We have attempted to establish experimentally the existence of this transformation following fixation or departure of the potassium from between the fundamental structural sheets of the mica type. The initial material was montmorillonite from Camp Bertaux, Morocco, separated from its impurities by sedimentation. As it was evident a priori that the alteration of montmorillonite into illite necessitates (1) saturation of the base-exchange capacity of the minerals by potassium, and (2) the departure of the layers of water from between the structural sheets of the montmorillonite, we finally, after several attempts, were led to make use of the following technique.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 28 , Issue 205 , June 1949 , pp. 606 - 611
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1949

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Footnotes

1

Read August 27, 1948, at the meeting of the Clay Minerals Group at the International Geological Congress, London, under the title: S. Hénin, Transformation des minéraux de la famille des montmorillonites en phyllites à 10 Å. (Internat. Geol. Congr., Volume of Titles and Abstracts, 1948, p. 128). A portion of the paper had appeared as a preliminary note: S. Caillère, S. Hénin, and S. Mériaux, Transformation expérimentale d'une montmorillonite en une phyllite à 10 Å type illite. Compt. Rend. Acad. Sci. Paris, 1948, vol. 226, pp. 680–681. [M.A. 10–368.] Translated by Dr. D. M. C. MacEwan.

References

page 606 note 2 Nagelschmidt, G., The mineralogy of soft colloids. Techn. Commun. Imp. Bur. Soil Sci. Harpenden, 1944, no. 42. [M.A. 9–76.]Google Scholar

page 610 note 1 Gruner, J. W., Amer. Min., 1939, vol. 24, p. 428. [M.A. 7479.]Google Scholar

page 611 note 1 Nagelschmidt, G. and Hicks, D., Min. Mag., 1943, vol. 26, p. 297.CrossRefGoogle Scholar