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Some problems in the identification of clay minerals in mixtures by X-ray diffraction. II. Chlorite, swelling chlorite and montmorillonite

Published online by Cambridge University Press:  14 March 2018

J. L. Martin Vivaldi  and
M. Rodriguez Gallego
J. L. Martin Vivaldi
Affiliation:
Estación Experimental del Zaidín and Departmento de Silicatos, Granada, Spain
M. Rodriguez Gallego
Affiliation:
Estación Experimental del Zaidín and Departmento de Silicatos, Granada, Spain
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Abstract

The possibility of the identification by X-ray diffraction of montmorillonite and swelling chlorite, in the presence or absence of each other, is discussed. Swelling chlorite or montmorillonite, even in mixture with normal chlorite, but in the absence of mica, can be identified by heating to 500°C with immediate sealing of the tube, or by acid treatment followed by solvation with ethylene glycol. If mica is present, however, only the latter procedure will usually ensure positive identification. The same procedures will differentiate montmorillonite and swelling chlorite in mixture only when normal chlorite is absent.

Type
Research Article
Information
Clay Minerals Bulletin , Volume 4 , Issue 26 , December 1961 , pp. 293 - 298
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1961

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References

Martin Vivaldi, J. L., and MacEwan, D. M. C., 1957. Clay Min. Bull., 3, 177.Google Scholar
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Martin Vivaldi, J. L., and Rodriguez Gallego, M., 1961. Clay Min. Bull., 4, 288.Google Scholar
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Rodriguez Gallego, M., 1960. Thesis, University of Granada.Google Scholar
Sanchez Camazano, M., 1960. Thesis, University of Salamanca. Google Scholar