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The supergene origin of ruthenian hexaferrum in Ni-laterites

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dc.contributor.authorAiglsperger, Thomas Hans
dc.contributor.authorProenza Fernández, Joaquín Antonio
dc.contributor.authorGalí Medina, Salvador, 1949-
dc.contributor.authorRius, Jordi
dc.contributor.authorLongo, Francisco
dc.contributor.authorDomènech Ortí, Cristina
dc.date.accessioned2020-05-15T11:08:08Z
dc.date.available2020-05-15T11:08:08Z
dc.date.issued2017-04-01
dc.date.updated2020-05-15T11:08:08Z
dc.description.abstractFor 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.
dc.format.extent20 p.
dc.format.mimetypeapplication/pdf
dc.identifier.idgrec677502
dc.identifier.issn0954-4879
dc.identifier.urihttps://hdl.handle.net/2445/160517
dc.language.isoeng
dc.publisherJohn Wiley & Sons
dc.relation.isformatofVersió postprint del document publicat a: https://doi.org/10.1111/ter.12254
dc.relation.ispartofTerra Nova, 2017, vol. 29, num. 2, p. 106-116
dc.relation.urihttps://doi.org/10.1111/ter.12254
dc.rights(c) John Wiley & Sons, 2017
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.sourceArticles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)
dc.subject.classificationCompostos de níquel
dc.subject.classificationLaterita
dc.subject.otherNickel compounds
dc.subject.otherLaterite
dc.titleThe supergene origin of ruthenian hexaferrum in Ni-laterites
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/acceptedVersion

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