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Kaolinite: NMF Intercalates

Published online by Cambridge University Press:  28 February 2024

Philippa J. R. Uwins,
Ian D. R. Mackinnon,
John G. Thompson and
Anya J. E. Yago
Philippa J. R. Uwins
Affiliation:
Centre for Microscopy and Microanalysis, The University of Queensland, St. Lucia QLD 4072, Australia
Ian D. R. Mackinnon
Affiliation:
Centre for Microscopy and Microanalysis, The University of Queensland, St. Lucia QLD 4072, Australia
John G. Thompson
Affiliation:
Research School of Chemistry, Australian National University, Canberra ACT 2601, Australia
Anya J. E. Yago
Affiliation:
Centre for Microscopy and Microanalysis, The University of Queensland, St. Lucia QLD 4072, Australia
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Abstract

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Bulk and size-fractionated kaolinites from seven localities in Australia as well as the Clay Minerals Society Source Clays Georgia KGa-1 and KGa-2 have been studied by X-ray diffraction (XRD), laser scattering, and electron microscopy in order to understand the variation of particle characteristics across a range of environments and to correlate specific particle characteristics with intercalation behavior. All kaolinites have been intercalated with N-methyl (NMF) after pretreatment with hydrazine hydrate, and the relative efficiency of intercalation has been determined using XRD. Intercalate yields of kaolinite: NMF are consistently low for bulk samples that have a high proportion of small-sized particles (i.e., <0.5 µm) and for biphased kaolinites with a high percentage (>60%) of low-defect phase. In general, particle size appears to be a more significant controlling factor than defect distribution in determining the relative yield of kaolinite: NMF intercalate.

Keywords

Defect distributionIntercalatesKaoliniteN-methyl formamideParticle size

Information

Type
Research Article
Information
Clays and Clay Minerals , Volume 41 , Issue 6 , December 1993, pp. 707 - 717
Copyright
Copyright © 1993, The Clay Minerals Society

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