An 57Fe Mossbauer effect study on glauconites from different locations in Belgium and Northern France
De Grave, E.; Vandenbruwaene, J.; Ellewaut, E. (1985). An 57Fe Mossbauer effect study on glauconites from different locations in Belgium and Northern France. Clay Miner. 20(2): 171-179. hdl.handle.net/10.1180/claymin.1985.020.2.02
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.