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An 57Fe Mossbauer effect study on glauconites from different locations in Belgium and Northern France

  • E. De Grave (a1), J. Vandenbruwaene (a1) and E. Elewaut (a2)

Sixteen glauconite samples from different locations in Belgium and Northern France were investigated by 57Fe Mössbauer spectroscopy at room temperature. The spectra were fitted with three Fe3+ and two Fe2+ doublets, both Fe species occupying M1(trans) and M2(cis) sites in the T-O-T layers. The third Fe3+ doublet was assigned to interlayer ferric complexes. The observed Mössbauer parameters did not show significant variations from sample to sample. No direct relation between K and Fe content was observed, although within some distinct groups (e.g. Bande Noire, Cenomanian) the amount of Fe2+ increased with increasing K content.

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Clay Minerals
  • ISSN: 0009-8558
  • EISSN: 1471-8030
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