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Infrared Absorption of O-H Bonds in Some Micas and Other Phyllosilicates

Published online by Cambridge University Press:  01 January 2024

Per Jørgensen
Per Jørgensen*
Affiliation:
Institute of Geology, Oslo, Blindern, Norway
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Abstract

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The frequencies, relative intensities and pleochroism of OH stretching bands in some micas and chlorites were studied, and the following conclusions are drawn

Trioctahedral 2:1 and 2:1:1 phyllosilicates, where all octahedral positions are filled with Mg, will have an absorption band about 3700 cm−1. These OH-groups have their axes normal to the mineral’s cleavage.

Substitution of Fe2+ for Mg results in a band about 3665 cm−1. Intensity ratios indicate that two Fe2+ most commonly substitute for two Mg in the same polyhedral group (pyramid).

Decreasing octahedral occupancy in the phlogopite-lepidomelane group, with increasing substitution of R3+ for Mg, causes bands with lower frequencies. These are not very sensitive to the incident angle for the infrared beam. In Li-micas where less than 50 per cent of the octahedral positions are filled with Li, and the rest of the positions are filled with Al and Fe2+, it seems probable that OH-groups residing in a pyramid with two Li and one Al cause a band about 3580 cm−1. Combinations of two Al and one Li or one Li, one Al and one Fe2+ cause absorption about 3480 cm−1.

Dioctahedral 2:1 phyllosilicates having Al or Fe3+ in octahedral positions cause absorption about 3620 cm−1.

Type
General Session
Information
Clays and Clay Minerals (National Conference on Clays and Clay Minerals) , Volume 13 , February 1964 , pp. 263 - 273
Copyright
Copyright © The Clay Minerals Society 1964

References

Bassett, W. A. (1960) Role of hydroxyl orientation in mica alteration, Bull. Geol. Soc. Am. 71, 449–56.CrossRefGoogle Scholar
Bradley, W. F., and Serratosa, J. M. (1960) A discussion of the water content of vermiculite, Clays and Clay Minerals, 7th Conf. [1958], pp. 260–70, Pergamon Press, New York.Google Scholar
Foster, M. D. (1956) Correlation of dioctahedral potassium micas on the basis of their. charge relations, U.S. Geol. Surv. Bull., 1036-D, pp. 57–67.Google Scholar
Foster, M. D. (1960a) Interpretation of the composition of trioctahedral micas, U.S. Geol. Survey Profess. Papers 354-B, pp. 10–48.CrossRefGoogle Scholar
Foster, M. D. (1960b) Interpretation of the composition of lithium micas, U.S. Geol. Surv. Profess. Papers 354-E.CrossRefGoogle Scholar
Foster, M. D. (1960c) Layer charge relations in the dioctahedral and trioctahedral micas, Am. Mineralogist 15, 383–98.Google Scholar
Grim, R. E., and Kulbicki, G. (1961) Montmorillonite: high temperature reactions and classification, Am. Mineralogist 46, 1329–69.Google Scholar
Hayashi, H., and Oinuma, K. (1963) X-ray and infrared studies on the behaviours of clay minerals on heating, Clay Sci. 1, 134–54.Google Scholar
Kodama, H., and Oinuma, K. (1962) Identification of kaolin minerals in clays by X-ray and infrared absorption spectra, Clay Sci, 1, 113–8.Google Scholar
Radoslovich, E. W. (1963) The cell dimensions and symmetry of layer-lattice silicates, V, Composition limits, Am. Mineralogist 48, 348–67.Google Scholar
Roy, R., and Roy, D. M. (1957) Hydrogen-deuterium exchange in clays and problems in the assignment of infrared frequencies in the hydroxyl region, Geochim. Cosmochim. Acta 11, 72–85.CrossRefGoogle Scholar
Serratosa, J. M. (1962) Dehydration and rehydration studies of clay minerals by infrared absorption spectra, Clays and Clay Minerals, 9th Conf, [1960], pp. 412–18, Pergamon Press, New York.Google Scholar
Serratosa, J. M., and Bradley, W. F. (1958) Infrared absorption of OH bonds in micas, Nature 181, 111.CrossRefGoogle Scholar
Stubičan, V., and Roy, R. (1961) Isomorphous substitution and infrared spectra of the layer lattice silicates, Am. Mineralogist 46, 32–52.Google Scholar
Tuddenham, W. M., and Lyon, R. J. P. (1960) Infrared techniques in the identification and measurement of minerals, Anal. Chem. 32, 1630–4.CrossRefGoogle Scholar
Vedder, W., and McDonald, R. S. (1963) Vibrations of the OH ions in muscovite, J. Chem. Phys. 38, 1583–90.Google Scholar
White, J. L., and Burns, A. F. (1963) Infrared spectra of hydronium ion in micaceous minerals, Science 141, 800–1.CrossRefGoogle ScholarPubMed