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Influence of KBr conditioning on the infrared hydroxyl-stretching region of saponites

M. Pelletier, L. J. Michot, O. Barres, B. Humbert, S. Petit and J. L. Robert
Influence of KBr conditioning on the infrared hydroxyl-stretching region of saponites
Clay Minerals (September 1999) 34 (3): 439-445

Abstract

In order to assess the influence of tetrahedral sheet charge on the hydroxyl-stretching vibration in clay minerals, a series of synthetic Na-saponites, with increasing layer charge, was studied by infrared (IR) spectroscopy. When recorded after KBr dilution either in transmission or diffuse reflectance, the IR spectra exhibit a component at approximately 3710 cm (super -1) , the intensity of which increases linearly with increasing layer charge. When experiments are carried out without any dilution of the samples, this component is not observed, suggesting a Na (super +) /K (super +) exchange upon mixing of the sample with KBr. The spectra obtained for K-saponite confirm this exchange. This shows that the dilution procedure can lead to serious misinterpretations of IR spectra in the OH-stretching region.


ISSN: 0009-8558
EISSN: 1471-8030
Coden: CLMIAF
Serial Title: Clay Minerals
Serial Volume: 34
Serial Issue: 3
Title: Influence of KBr conditioning on the infrared hydroxyl-stretching region of saponites
Affiliation: INPL-ENSG-CNRS UMR, Laboratoire "Environnement et Mineralurgie", Vandoeuvre, France
Pages: 439-445
Published: 199909
Text Language: English
Publisher: Mineralogical Society, London, United Kingdom
References: 11
Accession Number: 2000-033703
Categories: Sedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Secondary Affiliation: Universite de Poitiers, FRA, France
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200011
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