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The supergene origin of ruthenian hexaferrum in Ni-laterites
Department of Crystallography, Mineralogy, and Ore Deposits, University of Barcelona.
Departament de Cristal·lografia, Mineralogia i Dipòsits Minerals, Universitat de Barcelona.
Departament de Mineralogia, Petrologia i Geologia Aplicada, Universitat de Barcelona .
Institut de Ciència de Materials de Barcelona, CSIC, Campus de la Universitat Autònoma de Barcelona.
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2017 (English)In: Terra Nova, ISSN 0954-4879, E-ISSN 1365-3121, Vol. 29, no 2, p. 106-116Article in journal (Refereed) Published
Abstract [en]

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, μ‐Raman spectroscopy and synchrotron tts‐μXRD 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 (Ru0.4(Os,Ir)0.1Fe0.5)Ʃ1.0 stoichiometry represents the most advanced weathering product of primary laurite within Ni‐laterites from the Dominican Republic.

Place, publisher, year, edition, pages
John Wiley & Sons, 2017. Vol. 29, no 2, p. 106-116
National Category
Geology Geochemistry
Research subject
Applied Geochemistry
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URN: urn:nbn:se:ltu:diva-68073DOI: 10.1111/ter.12254OAI: oai:DiVA.org:ltu-68073DiVA, id: diva2:1193548
Available from: 2018-03-27 Created: 2018-03-27 Last updated: 2018-04-03Bibliographically approved

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Publisher's full texthttp://dx.doi.org/10.1111/ter.12254

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CiteExportLink to record
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