Magnetic, structural and Mössbauer study of soils from an ancient mining area in Huancavelica-Peru

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Corzo, MAC 
Borja-Castro, LE 
Valladares, LDLS 
González, JC 
Medina, JM 

jats:titleAbstract</jats:title>jats:pWe present the magnetic, structural and jats:sup57</jats:sup>Fe Mossbauer characterization of soils collected from an ancient mercury contaminated city named Huancavelica in Peru. The characterization results indicate that silicates and carbonates are the main mineralogical constituents in the samples. In addition, jats:sup57</jats:sup>Fe Mössbauer spectra at room temperature reveal, the presence of two components: a magnetic component related to magnetic Fe-oxides (magnetite, hematite, goethite) and a high non-magnetic component related to Fejats:sup+3</jats:sup> in high spin configuration and tetrahedral coordination in silicates. The magnetization measurements present screening of paramagnetic, ferromagnetic and antiferromagnetic signals, typical from soils containing different silicates and iron minerals. Remarkably the Verwey and Morin transitions corresponding to magnetite and hematite, respectively, are screened by the paramagnetic signal corresponding to the major silicate components in the samples. Overall, the soils are mainly composed of crystalline and amorphous silicates, calcites and iron bearing which are typical from Andean soils.</jats:p>

Mossbauer spectroscopy, Contaminated soils, Iron oxides, XRD, Magnetometry of soils
Journal Title
Hyperfine Interactions
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Springer Science and Business Media LLC
Universidad Nacional de Moquegua (unknown)
Universidad Nacional de Barranca (unknown)
Universidad Nacional de Cañete (Unknown)