Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (11) Citing Articles via Google Scholar Google Scholar Articles by Pelletier, M. Articles by Robert, J.-L. Search for Related Content GeoRef GeoRef Citation

Influence of layer charge on the hydroxyl stretching of trioctahedral clay minerals: A vibrational study of synthetic Na- and K-saponites

¹ Laboratoire Environnement et Minéralurgie, I.N.P.L.-ENSG-CNRS UMR 7569, 15 Avenue du Charmois, BP40, 54501 Vandoeuvre CEDEX, France
² Laboratoire de Chimie Physique et Microbiologie pour l’Environnement, UHP-CNRS UMR 7564, 405 route de Vandœuvre, 54600 Villers-les-Nancy, France
³ Laboratoire de Physique Quantique CNRS ESA 7069, ESPCI, 10 rue Vauquelin, 75231 Paris Cedex 05, France
⁴ ISTO, UMR 6113, CNRS-Université d’Orléans, 1A, Rue de la Férollerie, 45071 Orléans CEDEX 2, France

Correspondence: ^* E-mail: manuel.pelletier{at}ensg.inpl-nancy.fr

To understand the behavior of octahedral hydroxyl-stretching modes (_OH) as a function of increasing tetrahedral layer charge, infrared and Raman spectroscopic studies were carried out on a series of synthetic saponites. The nature of the monovalent interlayer cation (Na or K) and the hydration of the samples were shown to strongly influence spectral features. In the case of hydrated Na-samples, the _OH position shifts from 3678 to 3686 cm^–1 with increasing layer charge. For hydrated K-saponites, two components are observed around 3720 and 3680 cm^–1, assigned to OH perturbed by compensating cation and free OH groups, respectively. In the case of dehydrated samples both K and Na-saponites exhibit two components at 3677 and 3720 cm^–1. A linear relationship between the relative area of these two _OH components and the layer charge was then evidenced. To assign the features obtained for hydrated Na-samples in the OH-stretching modes domain, the Raman spectra were decomposed using four _OH components around 3675, 3680, 3685, and 3690 cm^–1. The evolution with layer charge of the relative proportions of these four components can be described by taking into account the location of hydrated cations, related to the distribution of tetrahedral substitutions. Such an assumption was confirmed using a simple statistical model that yields four populations of OH groups in the octahedral layer of hydrated Na-saponites.

This article has been cited by other articles:

				J. ORTEGA-CASTRO, N. HERNANDEZ-HARO, A. HERNANDEZ-LAGUNA, and C. I. SAINZ-DIAZ DFT calculation of crystallographic properties of dioctahedral 2:1 phyllosilicates Clay Minerals, September 1, 2008; 43(3): 351 - 361. [Abstract] [Full Text] [PDF]

				J. Sanz, J.-L. Robert, M. Diaz, and I. Sobrados Influence of charge location on 29Si NMR chemical shift of 2:1 phyllosilicates American Mineralogist, April 1, 2006; 91(4): 544 - 550. [Abstract] [Full Text] [PDF]

				S. Lantenois, B. Lanson, F. Muller, A. Bauer, M. Jullien, and A. Plancon EXPERIMENTAL STUDY OF SMECTITE INTERACTION WITH METAL Fe AT LOW TEMPERATURE: 1. SMECTITE DESTABILIZATION Clays and Clay Minerals, December 1, 2005; 53(6): 597 - 612. [Abstract] [Full Text] [PDF]

				R.J.M.J. Vogels, J.T. Kloprogge, and J.W. Geus Synthesis and characterization of saponite clays American Mineralogist, May 1, 2005; 90(5-6): 931 - 944. [Abstract] [Full Text] [PDF]

				L. J. Michot, I. Bihannic, M. Pelletier, E. Rinnert, and J.-L. Robert Hydration and swelling of synthetic Na-saponites: Influence of layer charge American Mineralogist, January 1, 2005; 90(1): 166 - 172. [Abstract] [Full Text] [PDF]