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Structural Studies of Nontronites with Different Iron Contents by 57Fe Mössbauer Spectroscopy

Published online by Cambridge University Press:  02 April 2024

C. M. Cardile  and
J. H. Johnston
C. M. Cardile
Affiliation:
Chemistry Department, Victoria University of Wellington, Private Bag, Wellington, New Zealand
J. H. Johnston*
Affiliation:
Chemistry Department, Victoria University of Wellington, Private Bag, Wellington, New Zealand
*
1To whom all correspondence should be addressed.
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Abstract

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The 57Fe Mössbauer spectra of a series of untreated and Ca-saturated nontronites showed a predominant Fe3+ resonance which was computer-fitted with two Fe3+ doublets defining iron in non-equivalent cis-FeO4(OH)2 octahedral sites. In most spectra a doublet indicating tetrahedral Fe3+ was fitted and in one untreated sample a doublet indicating interlayer Fe3+ was identified. In a further untreated sample the interlayer iron was present as Fe2+. Upon Ca-saturation the interlayer iron was displaced. It also appears that the interlayer iron was present in at least two different interlayer sites. From the computer-fitted data it was clear that the interlayer cations have a significant effect on the Mössbauer resonances of iron in the two non-equivalent cis-octahedral and the tetrahedral sites of nontronite.

Keywords

Interlayer cationIronMössbauer spectroscopyNontroniteStructural sites
Type
Research Article
Information
Clays and Clay Minerals , Volume 33 , Issue 4 , August 1985 , pp. 295 - 300
Copyright
Copyright © 1985, The Clay Minerals Society

References

Bancroft, G. M., 1973 Mössbauer Spectroscopy: An Introduction for Inorganic Chemists and Geochemists London McGraw-Hill.Google Scholar
Besson, G., Bookin, A. S., Dainyak, L. G., Rautureau, M., Tsipursky, S. I., Tchoubar, C. and Drits, V. A., 1983 Use of diffraction and Mössbauer methods for the structural and crystallochemical characterisation of nontronites J. Appl. Cryst. 16 374–383.CrossRefGoogle Scholar
Besson, G., Glaeser, R. and Tchoubar, G., 1983 Le césium révélateur de structure des smectites Clay Miner. 18 11–19.CrossRefGoogle Scholar
Diamant, A., Pasternak, M. and Banin, A., 1982 Characterization of adsorbed iron in montmorillonite by Mössbauer spectroscopy Clays & Clay Minerals 30 63–66.CrossRefGoogle Scholar
Endo, T., Mortland, M. M. and Pinnavaia, T. J., 1980 Intercalation of silica in smectite Clays & Clay Minerals 28 105–110.CrossRefGoogle Scholar
Goodman, B. A., 1978 The Mössbauer spectra of nontronites: consideration of an alternative assignment Clays & Clay Minerals 26 176–177.CrossRefGoogle Scholar
Goodman, B. A., Russell, J. D., Fraser, A. R. and Woodhams, F. W. D., 1976 A Mössbauer and infrared spectroscopic study of the structure of nontronite Clays & Clay Minerals 24 53–59.CrossRefGoogle Scholar
Helsen, J. A. and Goodman, B. A., 1983 Characterisation of iron(II) and iron(III)-exchanged montmorillonite and hectorite using the Mössbauer effect Clay Miner. 18 117–125.CrossRefGoogle Scholar
Johnston, J. H. and Cardile, C. M., 1985 Iron sites in nontronite and the effect of interlayer cations from Mössbauer spectra Clays & Clay Minerals 33 21–30.CrossRefGoogle Scholar
Johnston, J. H. and Cardile, C. M., 1985 Magnetic ordering of a nontronite at 4.2°K Clays & Clay Minerals (in press).Google Scholar
Rozenson, I. and Heller-Kallai, L., 1977 Mössbauer spectra of dioctahedral smectites Clays & Clay Minerals 25 94–101.CrossRefGoogle Scholar