Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-29T06:37:14.268Z Has data issue: false hasContentIssue false
  • English
  • Français

Mössbauer Spectroscopic Identification of Iron Oxides in Nontronite From Hohen Hagen, Federal Republic of Germany

Published online by Cambridge University Press:  02 April 2024

Paul R. Lear ,
Peter Komadel  and
Joseph W. Stucki
Paul R. Lear*
Affiliation:
Department of Agronomy, University of Illinois, Urbana, Illinois 61801
Peter Komadel*
Affiliation:
Department of Agronomy, University of Illinois, Urbana, Illinois 61801
Joseph W. Stucki
Affiliation:
Department of Agronomy, University of Illinois, Urbana, Illinois 61801
*
1Present address: Department of Chemistry, Michigan State University, East Lansing, Michigan 48824.
2Present address: Institute of Inorganic Chemistry, Center of Chemical Research, Slovak Academy of Sciences, 84236 Bratislava, Czechoslovakia.
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.

Iron impurities in the Hohen Hagen nontronite (NG-1) were identified as maghemite and goethite. The phase identified as maghemite was magnetically ordered at both room temperature and 87 K, with hyperfine magnetic fields of 48.6 and 50.7 tesla, respectively. Due to the magnetic properties of this phase, it was easily separated from aqueous dispersions of the clay using a hand magnet. X-ray powder diffraction analysis revealed maghemite, quartz, and phyllosilicate in the magnetically separated phase. The impurity identified as goethite remained in the non-magnetic <2-μm fraction of the clay, displayed magnetic order only at 87 K (47.44 tesla hyperfine field), and accounted for about 8% of the total area of the Mössbauer spectrum.

Keywords

GoethiteIronMaghemiteMagnetic propertiesMössbauer spectroscopyNontronite
Type
Research Article
Information
Clays and Clay Minerals , Volume 36 , Issue 4 , August 1988 , pp. 376 - 378
Copyright
Copyright © 1988, The Clay Minerals Society

References

Ericsson, T. and Wäppling, R., 1976 Texture effects in 3/2-1/2 Mössbauer spectra J. Phys., Collogue C6, Supplement 12 37 719 – 723.Google Scholar
Golden, D. C., Bowen, L. H., Weed, S. B. and Bigham, J. M., 1979 Mössbauer studies of synthetic and soil-occurring aluminum-substituted goethites Soil Sci. Soc. Amer. J. 43 802 – 808.CrossRefGoogle Scholar
Goodman, B. A., Russell, J. D., Fraser, A. R. and Woodhams, FWD, 1976 A Mössbauer and I.R. spectroscopic study of the structure of nontronite Clays & Clay Minerals 24 53 – 59.CrossRefGoogle Scholar
Malia, P. B., Douglas, L. A., Schultz, L. G., van Olphen, H. and Mumpton, F. A., 1987 Identification of expanding layer silicates: Charge density vs. expansion properties Proc. Int. Clay Conf., Denver, 1985 Bloomington, Indiana The Clay Minerals Society 277 – 283.Google Scholar
Murad, E., 1987 Mössbauer spectra of nontronites: Structural implications and characterization of associated iron oxides: Z Pflanzenernähr. Bodenk. 150 279 – 285.CrossRefGoogle Scholar
Murad, E., Stucki, J. W., Goodman, B. A. and Schwertmann, U., 1988 Properties and behavior of iron oxides as determined by Mössbauer spectroscopy Iron in Soils and Clay Minerals Dordrecht D. Reidel 309 – 350.CrossRefGoogle Scholar
Murad, E. and Schwertmann, U., 1983 The influence of aluminum substitution and crystallinity on the Mössbauer spectra of goethite Clay Miner. 18 301 – 312.CrossRefGoogle Scholar
Schneiderhöhn, P., 1965 Nontronit vom Hohen Hagen and Chloropal vom Meenser Steinberg bei Göttingen Tschermaks Min. Pet. Mitt. 10 385 – 399.CrossRefGoogle Scholar
Sprenkel-Segel, E. L., 1970 Recoilless resonance spectroscopy of meteoritic iron oxides J. Geophys. Res. 75 6618 – 6630.CrossRefGoogle Scholar