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Kaolinite-NMF intercalates

By Philippa J.R. Uwins, Ian D.R. Mackinnon, John G. Thompson and Anya J.E. Yago

Abstract

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

Topics: 040306 Mineralogy and Crystallography, clay mineralogy, crystal structure, defects, kaolinite, SEM data, sheet silicates, synthesis, X-ray diffraction data
Publisher: Clay Minerals Society
Year: 1993
DOI identifier: 10.1346/CCMN.1993.0410609
OAI identifier: oai:eprints.qut.edu.au:55699
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