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Distribution of isomorphous cations within octahedral sheets in montmorillonite from Camp-Bertaux

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Abstract

 Ni-saturated montmorillonite from Camp-Bertaux heated at different temperatures has been studied by X-ray powder diffraction, X-ray absorption (EXAFS) and vibration IR spectroscopy. Analysis of the experimental data has shown that heating of samples at temperatures higher than 150° C was accompanied by migration of Ni cations into vacant cis-octahedra of 2:1 layers. In the octahedral sheet the Ni cation has two “heavy” (Fe) and four “light” (Al and Mg) nearest octahedral cations. A model for the octahedral cation distribution in Camp-Bertaux montmorillonite was proposed in which Fe and Mg octahedral cations are segregated in small clusters.

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Authors and Affiliations

  1. C.R.M.D., University of Orlénas – C.N.R.S., B.P. 6759,45067 Orleans, France, , , , , , FR

    F. Muller & G. Besson

  2. Environmental Geochemistry Group, L.G.I.T. – I.R.I.G.M., C.N.R.S. – University of Grenoble, BP 53, 38041 Grenoble, France, , , , , , FR

    A. Manceau

  3. G.I.N. of the Russian Academy of Sciences, Pyzhevsky per.7, Moscow, Russia, , , , , , RU

    V.-A. Drits

Authors
  1. F. Muller
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  2. G. Besson
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  3. A. Manceau
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  4. V.-A. Drits
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Received July 7, 1996 / Revised, accepted August 23, 1996

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Muller, F., Besson, G., Manceau, A. et al. Distribution of isomorphous cations within octahedral sheets in montmorillonite from Camp-Bertaux. Phys Chem Min 24, 159–166 (1997). https://doi.org/10.1007/s002690050029

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  • DOI: https://doi.org/10.1007/s002690050029

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