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This article in SSSAJ

  1. Vol. 33 No. 6, p. 967-970
    Received: Aug 26, 1968
    Accepted: Aug 11, 1969

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Mössbauer Effect in Clay-Iron Oxide Complexes1

  1. N. J. Yassoglou and
  2. J. B. Peterson2



Clay-iron oxide complexes were prepared by precipitating iron oxides on kaolinite and bentonite surfaces in acidic suspensions. Mössbauer spectra of these complexes and of a soil clay separate showed measurable absorption of the 14.4 KeV X-ray of 57mFe. The effect was attributed to 57Fe nuclei precipitated as oxides on the surface of the clay minerals. An increase in the fraction of the gamma rays absorbed without recoil energy loss was observed upon the association of the iron oxide with clay surfaces. The oxalate treatment affected significantly the symmetry of the electrical field around the iron atoms of the complex. The soil clay separate showed resonance absorption both by ferric and ferrous iron. The results show that the chemistry of iron in the soil and of the clay surface may be successfully studied through Mössbauer spectroscopy.

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