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Título: | Mössbauer spectroscopy in the investigation of new mineral-related materials |
Autor: | Berry, F.J.; de Laune, Benjamin P.; Greaves, C.; Whitaker, M.J.; Thomas, M.F.; Marco, J.F. CSIC ORCID CVN | Fecha de publicación: | 2014 | Editor: | Kluwer Academic Publishers | Citación: | Hyperfine Interaction 226: 545- 552 (2014) | Resumen: | New materials based on the composition of the mineral schafarzikite, FeSb2O4, have been synthesised. 57Fe- and 121Sb- Mössbauer spectroscopy shows that iron is presentas Fe2+ and that antimony is present as Sb3+. The presence of Pb2+ on the antimony sitesin materials of composition FeSb1.5Pb0.5O4 induces partial oxidation of Fe2+ to Fe3+. Thequasi-one-dimensionalmagnetic structure of schafarzikite is retained in FeSb1.5Pb0.5O4 andgives rise to weakly coupled non-magnetic Fe2+ ions coexisting with Fe3+ ions in a magneticallyordered state. A similar model can be applied to account for the spectra recordedfrom the compound Co0.5Fe0.5Sb1.5Pb0.5O4. © 2013 Springer Science+Business Media Dordrecht. | URI: | http://hdl.handle.net/10261/114443 | DOI: | 10.1007/s10751-013-0967-6 | Identificadores: | doi: 10.1007/s10751-013-0967-6 issn: 0304-3843 |
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