TY - JOUR
T1 - Magnetic, structural and Mössbauer study of soils from an ancient mining area in Huancavelica-Peru
AU - Corzo, M. A.Castillo
AU - Borja-Castro, L. E.
AU - Valladares, L. De Los Santos
AU - González, J. C.
AU - Medina, J. Medina
AU - Quinde, A. Trujillo
AU - Barnes, C. H.W.
AU - Rodriguez, V. A.Peña
N1 - Publisher Copyright:
© 2021, The Author(s).
PY - 2022/12
Y1 - 2022/12
N2 - We present the magnetic, structural and 57Fe 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, 57Fe 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 Fe+3 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.
AB - We present the magnetic, structural and 57Fe 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, 57Fe 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 Fe+3 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.
KW - Contaminated soils
KW - Iron oxides
KW - Magnetometry of soils
KW - Mössbauer spectroscopy
KW - XRD
UR - http://www.scopus.com/inward/record.url?scp=85121547949&partnerID=8YFLogxK
U2 - 10.1007/s10751-021-01786-8
DO - 10.1007/s10751-021-01786-8
M3 - Artículo
AN - SCOPUS:85121547949
SN - 0304-3843
VL - 243
JO - Hyperfine Interactions
JF - Hyperfine Interactions
IS - 1
M1 - 3
ER -