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FT-IR Partial Least-Squares Analysis of Tubular Halloysite in Kaolin Samples from the Mount Hope Kaolin Deposit

Published online by Cambridge University Press:  09 July 2018

L J. Janik  and
J. L. Keeling
L J. Janik
Affiliation:
CSIRO Division of Soils, Private Bag 2, Glen Osmond, South Australia and
J. L. Keeling
Affiliation:
Department of Mines & Energy, 191 Greenhill Road, Parkside, Adelaide, South Australia
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Abstract

A method of infrared (IR) analysis for quantitative determination of tubular halloysite in mixtures with kaolinite was investigated for drill hole samples collected during an assessment of paper-coating kaolin resources at the Mount Hope Kaolin Deposit, Eyre Peninsula, South Australia. Tubular, dehydrated halloysite from the deposit does not readily intercalate formamide, and the proportion of tubes in <2 μm size-fractions was determined initially from scanning electron micrographs. For samples showing a range of tube contents, a strong correlation between IR spectral response and counts of halloysite tubes was established using partial leastsquares analysis. This provided a rapid technique suitable for routine determination of tubular halloysite in samples from the Mount Hope deposit. Although the universality of the method remains to be tested, it offers an alternative approach to other analytical techniques for assessment of kaolin deposits where the presence of halloysite is suspected.

Type
Research Article
Information
Clay Minerals , Volume 28 , Issue 3 , September 1993 , pp. 365 - 378
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1993

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