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. 2016 Jul 27;11(7):e0159972. doi: 10.1371/journal.pone.0159972

Fig 7. Mossbauer spectroscopy carried out on fine clay material of the greenish horizon 4 dominated by Fe-mica.

Fig 7

The deconvolution into 3 doublets shows octahedral Fe3+ (doublets 1 and 3) and secondarily octahedral Fe2+ (doublet 2).