Hostname: page-component-586b7cd67f-dlnhk Total loading time: 0 Render date: 2024-11-22T19:35:21.764Z Has data issue: false hasContentIssue false
  • English
  • Français

Mössbauer and IR analysis of iron sites in four ferruginous smectites

Published online by Cambridge University Press:  09 July 2018

J. D. Cashion ,
W. P. Gates  and
A. Thomson
J. D. Cashion*
Affiliation:
School of Physics, Monash University, Victoria 3800, Australia
W. P. Gates
Affiliation:
Department of Civil Engineering, Monash University, Victoria 3800, Australia
A. Thomson
Affiliation:
School of Physics, Monash University, Victoria 3800, Australia
*
*E-mail: [email protected]
Get access Rights & Permissions [Opens in a new window]

Abstract

57Fe Mössbauer spectra of the Na+- and Ca2+-saturated forms of four ferruginous smectites,displaying a range of compositions, have been fitted with Voigtian profiles to represent (principally) two correlated distributions of isomer shifts and quadrupole splittings for the Fe3+ sites. Correlating the areas and hyperfine parameters of these distributions with simulations of the octahedral array of cations based on chemical analyses and infrared spectroscopy has enabled identification of the Fe3+ ions that contribute to the outer quadrupole doublet. The octahedral Fe3+ sites are characterized as having at least one Mg2+ nearest-cation neighbour and probably a cisconfiguration with respect to the OH– ions.

Keywords

Mössbauer spectroscopyIRferruginoussmectitesVoigtian profilesFe3+Fe2+
Type
Research Article
Information
Clay Minerals , Volume 43 , Issue 1 , March 2008 , pp. 83 - 93
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2008

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

Besson, G., Bookin, A.S., Daynyak, L.G., Rautureau, M., Tsipursky, S.I., Tchoubar, C. & Drits, V.A. (1983) Use of diffraction and Mössbauer methods for the structural and crystallochemical characterisation of nontronites. Journal of Applied Crystallography, 16, 374–383.Google Scholar
Besson, G., Drits, V.A., Daynyak, L.G. & Smoliar, B.B. (1987) Analysis of cation distribution in dioctahedral micaceous minerals on the basis of IR spectroscopy data. Clay Minerals, 22, 465–478.Google Scholar
Bishop, J.L., Murad, E., Madejová, J., Komadel, P., Wagner, U. & Scheinost, A.C. (1999) Visible Mössbauer and infrared spectroscopy of dioctahedral smectites: structural analysis of the Fe-bearing smectites Sampor, SWy-1 and SWa-1. Pp. 413–419 in: Clays For Our Future (Kodoma, H., Mermut, A.R. & Torrance, J.K., editors). Proceedings of the 11th International Clay Conference, Ottawa Canada, 1997.Google Scholar
Bodine, M.W. Jr. (1987) CLAYFORM: A Fortran 77 computer program apportioning the constituents in the chemical analysis of a clay or other silicate mineral in a structural formula. Computers and Geosciences, 13, 77–88.Google Scholar
Cíčel, B., Komadel, P., Lego, S., Madejová, J. & Vlcková, L. (1992) Iron-rich beidellite in the fine fraction of Stebno bentonite. Geologica Carpathica, Series Clays, 2, 121-124.Google Scholar
Dainyak, L.G., Zviagina, B.B., Rusakov, V.S. & Drits, V.A. (2006) Interpretation of the nontronite-dehydroxylate Mössbauer spectrum using EFG calculations. European Journal of Mineralogy, 18, 753–764.Google Scholar
Gates, W.P. (2005) Infrared spectroscopy and the chemistry of dioctahedral smectites. Pp. 125–168 in: Vibrational Spectroscopy of Layer Silicates and Hydroxides (Kloprogge, T., editor). The Clay Minerals Society, CMS Workshop Lecture Series Vol 14, Aurora, Colorado, USA.Google Scholar
Gates, W.P. (2006) X-ray absorption spectroscopy. Pp. 789–864 in: Handbook of Clay Science, (Bergaya, F., Theng, B.K.G. & Lagaly, G., editors). Developments in Clay Science, Vol. 1, Elsevier, Amsterdam.Google Scholar
Gates, W.P. (2008) Cation mass — valence sum approach to assigning OH bands in dioctahedral smectites. Clays and Clay Minerals, 52, 10–22.Google Scholar
Gates, W.P., Slade, P.G., Manceau, A. & Lanson, B. (2002) Site occupancies by iron in nontronites. Clays and Clay Minerals, 50, 223–239.Google Scholar
Goodman, B.A., Russell, J.D., Fraser, A.R. & Woodhams, F.W.D. (1976) A Mössbauer and infrared spectroscopic study of the structure of nontronite. Clays and Clay Minerals, 24, 53–59.Google Scholar
Heller-Kallai, L. & Rozenson, I. (1981) The use of Mössbauer spectroscopy of iron in clay mineralogy. Physics and Chemistry of Minerals, 7, 223–238.Google Scholar
Johnston, J.H. & Cardile, C.M. (1985) Iron sites in nontronite and the effect of interlayer cations from Mössbauer spectra. Clays and Clay Minerals, 33, 21–30.Google Scholar
Madejová, J., Komadel, P. & Cíčel, B. (1994) Infrared study of octahedral site populations in smectites. Clay Minerals, 29, 319–326.Google Scholar
Manceau, A., Lanson, B., Drits, V.A., Chateigner, D., Gates, W.P., Wu, J., Huo, D. & Stucki, J.W. (2000) Oxidation-reduction mechanism of iron in dioctahedral smectites: I. Crystal chemistry of oxidized reference nontronites. American Mineralogist, 85, 133–152.Google Scholar
Norrish, K. & Hutton, J.T. (1969) An accurate X-ray spectrographic method for the analysis of a wide range of geological samples. Geochimica et Cosmochimica Acta, 33, 431–453.CrossRefGoogle Scholar
Rancourt, D.G. (1994) Mössbauer spectroscopy of minerals: II. Problem of resolving cis- and transoctahedral Fe2+ sites. Physics and Chemistry of Minerals, 21, 250–257.Google Scholar
Rancourt, D.G. & Ping, J.Y. (1991) Voigt-based methods for arbitrary-shape static hyperfine parameter distributions in Mössbauer spectroscopy. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 58, 85–97.Google Scholar
Vantelon, D., Pelletier, M., Michot, L.J., Barres, O. & Thomas, F. (2001) Fe, Mg and Al distribution in the octahedral sheet of montmorillonites. An infrared study of the OH-bending region. Clay Minerals, 36, 369–379.Google Scholar
Vantelon, D., Montarges-Pelletier, E., Michot, L.J., Brios, V., Pelletier, M. & Thomas, F. (2003) Iron distribution in the octahedral sheet of dioctahedral smectites. An Fe K-edge X-ray absorption spectroscopy study. Physics and Chemistry of Minerals, 30, 44–53.CrossRefGoogle Scholar