Hostname: page-component-78c5997874-fbnjt Total loading time: 0 Render date: 2024-11-02T19:06:24.387Z Has data issue: false hasContentIssue false
  • English
  • Français

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

Published online by Cambridge University Press:  09 July 2018

M. Pelletier ,
L. J. Michot ,
O. Barrès ,
B. Humbert ,
S. Petit  and
J.-L. Robert
M. Pelletier
Affiliation:
Laboratoire "Environnement et Minéralurgie", INPL-ENSG-CNRS UMR 7569, 15 av. du Chamois, 54501 Vandoeuvre Cedex
L. J. Michot
Affiliation:
Laboratoire "Environnement et Minéralurgie", INPL-ENSG-CNRS UMR 7569, 15 av. du Chamois, 54501 Vandoeuvre Cedex
O. Barrès
Affiliation:
Laboratoire "Environnement et Minéralurgie", INPL-ENSG-CNRS UMR 7569, 15 av. du Chamois, 54501 Vandoeuvre Cedex
B. Humbert
Affiliation:
Laboratoire de Chimie Physique pour l'Environnement, UMR CNRS-UHP, Nancy I 7564
S. Petit
Affiliation:
"Hydr.A.S.A." CNRS-UMR6532, Université de Poitiers, 40 Av. du Recteur Pineau, 86022 Poitiers Cedex
J.-L. Robert
Affiliation:
Centre de Recherches sur la Synthèse et la Chimie des Minéraux, CNRS-UPR4201, 1A, Rue de la Férollerie, 45071 Orléans Cedex 2, France
Get access Rights & Permissions [Opens in a new window]

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 ~3710 cm-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+/K+ 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.

Type
Research Article
Information
Clay Minerals , Volume 34 , Issue 3 , September 1999 , pp. 439 - 445
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1999

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bergaoui, L., Lambert, J.F., Vicente-Rodriguez, M.A., Michot, L.J. & Villiéras, F. (1995) Porosity of synthetic saponites with variable layer charge pillared by Al13 polycations. Langmui. 11, 2849–2852.Google Scholar
Bishop, J.L., Pieters CM. & Edwards IO. (1994) Infrared spectroscopic analyses on the nature of water in montmorillonite. Clays Clay Miner. 42, 702–716.CrossRefGoogle Scholar
Chaussidon, J. (1970) Stretching frequencies of structural hydroxyls of hectorite and K-depleted phlogopite as influenced by interlayer cation and hydration. Clays Clay Miner. 18, 139–149.CrossRefGoogle Scholar
Farmer, V.C. (editor) (1974) The Infrared Spectra of Minerals. Monograph 4. Mineralogical Society, London.CrossRefGoogle Scholar
Humbert, B. (1991) Développements expérimentaux et théoriques en spectrometries Infrarouge et Raman. Application à l'étude de silices divisées. Thèse Doc. Univ. Nancy I, France.Google Scholar
Johnston, C.T., Sposito, G. & Erickson, C. (1992) Vibrational probe studies of water interactions with montmorillonite. Clays Clay Miner. 40, 722–730.Google Scholar
Petit, S., Righi, D., Madejova, J. & Decarreau, A. (1998) Layer charge estimation of smectites using infrared spectroscopy. Clay Miner. 33, 579–591.Google Scholar
Poinsignon, C., Cases, J.M. & Fripiat, J.J. (1978) Electrical polarization of water molecules adsorbed by smectites. An infrared study. J. Phys. Chem. 82, 1855–1860.Google Scholar
Russell, J.D. & Fraser, A.R. (1994) Infrared methods. Pp. 11-67 in: Clay Mineralogy: Spectroscopic and Chemical Determinative Methods. (Wilson, M.J., editor). Chapman & Hall, London.Google Scholar
Suquet, H., Prost, R. & Pezerat, H. (1982) Etude par spectroscopic infrarouge et diffraction X des interactions eau-cation-feuillet dans les phases à 14.6, 12.2, et 10.1 A d'une saponite-Li de synthèse. Clay Miner. 17, 231–241.Google Scholar
Van der Marel, H.W. & Beutelspacher, H. (1976) Atlas of Infrared Spectroscopy of Clay Minerals and their Admixtures. Elsevier, Amsterdam.Google Scholar