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Mineralogy of the <2 μm fraction of three mixed-layer clays from southern and central Tunisia

Published online by Cambridge University Press:  09 July 2018

H. Ben Rhaiem ,
D. Tessier  and
A. Ben Haj Amara
H. Ben Rhaiem*
Affiliation:
LPM, Faculté des Sciences de Bizerte, 7021 Jarzouna, Tunisia
D. Tessier
Affiliation:
Station de Recherche du Sol, INRA, 78026 Versailles, France
A. Ben Haj Amara
Affiliation:
LPM, Faculté des Sciences de Bizerte, 7021 Jarzouna, Tunisia
*
*E-mail: [email protected]
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Abstract

Three clay minerals from southern and central Tunisia were characterized. Both XRD quantitative analysis and a chemical method were used to determine the mineralogical and physico-chemical characteristics of the <2 μm clay fractions. The XRD, CEC and specific surface measurement analyses showed that the dominant phase in all samples is illite-smectite with kaolinite and traces of quartz also present. From quantitative XRD, the abundances of the minerals identified are consistent with the measured CEC, specific surface area and TG/DTA properties. Analysis by XRD also showed that the illite-smectite phases are composed of thin stacks (two to a maximum of ten layers per stack) of random illite-smectite and ordered (R1) illite-smectite. There is also some discrete illite.

Keywords

illite-smectiteXRDCECTG/DTATunisia
Type
Research Article
Information
Clay Minerals , Volume 35 , Issue 2 , April 2000 , pp. 375 - 381
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2000

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