# name
The supergene origin of ruthenian hexaferrum in Ni-laterites

# metadata.dc.description.abstract[].value
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.

# metadata.dc.source[].value
Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)

# metadata.dc.title[].value
The supergene origin of ruthenian hexaferrum in Ni-laterites