An 57Fe Mossbauer effect study on glauconites from different locations in Belgium and Northern France
In: Clay minerals. Blackwell Scientific: Oxford. ISSN 0009-8558; e-ISSN 1471-8030, meer
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Auteurs | | Top |
- De Grave, E.
- Vandenbruwaene, J.
- Ellewaut, E.
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Abstract |
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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