publication . Other literature type . 2007

Iron-bearing phases in a peat-derived duricrust from Brazil

Varajao, Afdc; Da Costa, G. M.; Varajao, C. A. C.; Meunier, J. D.; Colin, Fabrice;
Open Access
  • Published: 01 Jan 2007
  • Country: United States
Abstract
The formation of aluminium-substituted iron-minerals is still subject to debate. We report a case study in a Humic Gleysol soil profile, developed on a sedimentary saprolite, from a basin floor on the Uberaba Plateau (Minas Gerais State, Brazil) where iron-phases are crystallized by a ferruginization process. The mineralogical and chemical properties were investigated by X-ray diffraction, thermogravimetric analysis, differential scanning calorimetry and Mossbauer spectroscopy. The specific surface area (BET method) and cation exchange capacity (CEC) were also determined. The soil profile is mainly composed of gibbsite, kaolinite and amorphous alumino-silicate p...
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Other literature type . 2007
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