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Significance of Kaolinite Intersalation in Clay Mineral Analysis

Published online by Cambridge University Press:  01 January 2024

M. L. Jackson*
Affiliation:
Department of Soils, University of Wisconsin Madison, Wisconsin, USA

Abstract

Recent development of the intersalation method by which kaolinite (as well as dickite and halloysite) is expanded makes possible the application of X-ray diffraction to qualitative and semiquantitative determinations of these mineral species. It also permits their distinction from the X-ray-thermally similar intergradient 2:1–2:2 layer silicates which are not affected by the treatment. Intergradient 2:1–2:2 layer silicates are developed by interlayer precipitation of hydroxides of aluminum, iron, and magnesium during pedogeochemical weathering and probably also during burial in sediments. The quantitative determination of kaolinite-halloysite by NaOH differential dissolution is completely corroborated by the qualitative, semiquantitative X-ray diffraction intersalation technique with respect to their clear differentiation from chlorite and intergradient clays.

Type
General Session
Copyright
Copyright © The Clay Minerals Society 1960

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References

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