Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-24T01:26:03.820Z Has data issue: false hasContentIssue false
  • English
  • Français

Far-Infrared Study of Potassium in Micas

Published online by Cambridge University Press:  02 April 2024

R. Prost  and
V. Laperche
R. Prost
Affiliation:
Station de Science du Sol, Institut National de la Recherche, Agronomique, Route de Saint-Cyr, 78026 Versailles Cédex, France
V. Laperche
Affiliation:
Station de Science du Sol, Institut National de la Recherche, Agronomique, Route de Saint-Cyr, 78026 Versailles Cédex, France
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The characterization of cations associated with clay materials has generally been approached by the sequential use of specific chemical reagents. To avoid the disturbing effect of the chemical reagents on the state and location of compensating cations of clays and to get information in situ, far-infrared spectroscopy was used. The far-infrared vibrational spectra of the potassium cation in muscovite, phlogopite, and biotite were recorded before and after heating at the dehydroxylation temperature. The vibrational frequency of K in micas before dehydroxylation was found to be a function of the di- or trioctahedral character and of the Fe content. After dehydroxylation or deprotonation, shifts of the K absorption band to lower frequencies were observed for the heated muscovite, in which K exchangeability increased, and to higher frequencies for the heated biotite, in which K exchangeability decreased. These results suggest that the vibrational frequency of potassium is characteristic of the state of K in these minerals and of its ability to be exchanged.

Keywords

BiotiteDehydroxylationFar-infrared spectroscopyMuscovitePhlogopitePotassium
Type
Research Article
Information
Clays and Clay Minerals , Volume 38 , Issue 4 , August 1990 , pp. 351 - 355
Copyright
Copyright © 1990, The Clay Minerals Society

References

References Cited

Eberhart, P. J., 1963 Etude des transformations du mica muscovite par chauffage entre 700° et 1200°C Bull. Soc. Franç. Mineral. Cristallogr. 86 213 – 251.Google Scholar
Ishii, M., Shimanouchi, T. and Nakahira, M., 1967 Far infrared absorption spectra of layer silicates Inorg. Chimica Acta 1 387 – 392.CrossRefGoogle Scholar
Norrish, K. and Serratosa, J. M., 1972 Forces between clay particles Proc. Int. Clay Conf., Madrid, 1972 Madrid Div. Ciencias C.S.I.C 375 – 382.Google Scholar
Quémener, J., 1976 Analyse du potassium dans les sols Dossier K2O SCPA 4 1 – 26.Google Scholar
Rousseaux, J. M., Nathan, Y., Vielvoye, L. A., Herbillon, A. and Serratosa, J. M., 1972 The vermiculitization of trioctahedral micas. II. Correlations between the K level and crystallographic parameters Proc. Int. Clay Conf., Madrid, 1972 Madrid Div. Ciencias C.S.I.C 449 – 456.Google Scholar
Scott, A. D., Ismail, F. T., Locatis, R. R. and Serratosa, J. M., 1972 Changes in interlayer potassium exchangeability induced by heating micas Proc. Int. Clay Conf., Madrid, 1972 Madrid Div. Ciencias C.S.I.C 467 – 479.Google Scholar
Vedder, W. and McDonald, R. S., 1963 Vibrations of the OH ions in muscovite J. Chem. Phys. 38 1583 – 1590.CrossRefGoogle Scholar
Vedder, W. and Wilkins, R. W. T., 1969 Dehydroxylation and rehydroxylation, oxidation, and reduction of micas Amer. Mineral. 54 482 – 509.Google Scholar