Kaolinite particle sizes in the <2 µM range using laser scattering

Mackinnon, Ian D.R., Uwins, Philippa J. R., Yago, Anya, & Page, David (1993) Kaolinite particle sizes in the <2 µM range using laser scattering. Clays and Clay Minerals, 41(5), pp. 613-623.

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Abstract

The Clay Minerals Society Source Clay kaolinites, Georgia KGa-1 and KGa-2, have been subjected to particle size determinations by 1) conventional sedimentation methods, 2) electron microscopy and image analysis, and 3) laser scattering using improved algorithms for the interaction of light with small particles. Particle shape, size distribution, and crystallinity vary considerably for each kaolinite. Replicate analyses of separated size fractions showed that in the <2 µm range, the sedimentation/centrifugation method of Tanner and Jackson (1947) is reproducible for different kaolinite types and that the calculated size ranges are in reasonable agreement with the size bins estimated from laser scattering. Particle sizes determined by laser scattering must be calculated using Mie theory when the dominant particle size is less than ∼5 µm. Based on this study of two well-known and structurally different kaolinites, laser scattering, with improved data reduction algorithms that include Mie theory, should be considered an internally consistent and rapid technique for clay particle sizing.

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ID Code: 55698
Item Type: Journal Article
Refereed: Yes
Additional Information: GeoRef, Copyright 2009, American Geological Institute.
1994-004366
Keywords: algorithms, clay minerals, Georgia, grain size, imagery, kaolinite, laser methods, mineral data, particles, sheet silicates
DOI: 10.1346/CCMN.1993.0410512
ISSN: 0009-8604
Subjects: Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > GEOLOGY (040300) > Mineralogy and Crystallography (040306)
Divisions: Current > Institutes > Institute for Future Environments
Copyright Owner: Copyright 1993 The Clay Minerals Society
Copyright Statement: Reproduced with kind permission of The Clay Minerals Society, publisher of Clays and Clay Minerals
Deposited On: 30 Jan 2013 04:12
Last Modified: 12 Nov 2013 04:07

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