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https://hdl.handle.net/2445/160517| Title: | The supergene origin of ruthenian hexaferrum in Ni-laterites |
| Author: | Aiglsperger, Thomas Hans Proenza Fernández, Joaquín Antonio Galí Medina, Salvador, 1949- Rius, Jordi Longo, Francisco Domènech Ortí, Cristina |
| Keywords: | Compostos de níquel Laterita Nickel compounds Laterite |
| Issue Date: | 1-Apr-2017 |
| Publisher: | John Wiley & Sons |
| Abstract: | For two decades, the nature of Fe-rich, oxygen-bearing, Ru-Os compounds found in the supergene environment has been debated. Ru-Os-Fe-oxides and nano-intergrowths of ruthenium with magnetite have been proposed. We applied FE-SEM, EMPA, mu-Raman spectroscopy and synchrotron tts-lXRD to Ru-Os-Fe compounds recovered from Ni-laterites from the Dominican Republic. The results demonstrate that a significant portion of Fe exists in a common structure with the Ru-Os alloy, that is, ruthenian hexaferrum. This mineral occurs both as nanoparticles and as micrometric patches within a matrix of Fe-oxide(s). Our data suggest that supergene ruthenian hexaferrum with a (Ru-0.4(Os, Ir)(0.1)Fe-0.5)(Sigma 1.0) stoichiometry represents the most advanced weathering product of primary laurite within Ni-laterites from the Dominican Republic. |
| Note: | Versió postprint del document publicat a: https://doi.org/10.1111/ter.12254 |
| It is part of: | Terra Nova, 2017, vol. 29, num. 2, p. 106-116 |
| URI: | https://hdl.handle.net/2445/160517 |
| Related resource: | https://doi.org/10.1111/ter.12254 |
| ISSN: | 0954-4879 |
| Appears in Collections: | Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada) |
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| 677502.pdf | 311.74 kB | Adobe PDF | View/Open |
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