Herein we report on synthetic iron-intercalated vermiculites prepared from a Mg-vermiculite mineral from Santa Olalla, Huelva, Spain, by means of an ion exchange process from aqueous solutions of FeCl2 and FeCl3. Thermogravimetric, X-ray diffraction, magnetic susceptibility and Mössbauer spectral studies have been used to characterize the synthetic iron-intercalated vermiculites. The results suggest that the intercalation process employed induces modifications in both the interlayer spacing and in the octahedral sheet; the disordered structure of the Mg-vermiculite mineral is not altered. The presence of solvated Fe(H2O) n 2+ ions has been shown by the Mössbauer spectroscopy. No magnetic order has been observed between 2 and 300 K neither in the Mg-vermiculite mineral nor in the two synthetic iron-intercalated vermiculites.
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Titolo: | Chemical and physical characterization of iron-intercalated vermiculite compounds | |
Autori: | A., Argüelles; S. A., Khainakov; J., Rodríguez Fernández; Leoni, Matteo; J. A., Blanco; C., Marcos | |
Autori Unitn: | ||
Titolo del periodico: | PHYSICS AND CHEMISTRY OF MINERALS | |
Anno di pubblicazione: | 2011 | |
Numero e parte del fascicolo: | 7 | |
Codice identificativo Scopus: | 2-s2.0-79955940075 | |
Codice identificativo WOS: | WOS:000290492500007 | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1007/s00269-011-0429-0 | |
Handle: | http://hdl.handle.net/11572/92975 | |
Appare nelle tipologie: | 03.1 Articolo su rivista (Journal article) |