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An X-ray photoelectron and absorption spectroscopic investigation of the electronic structure of cubanite, CuFe2S3

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dc.contributor.authorGoh, S.W.
dc.contributor.authorBuckley, A.
dc.contributor.authorSkinner, W.M.
dc.contributor.authorFan, L.
dc.date.issued2010
dc.description.abstractX-ray photoelectron and absorption spectra have been obtained for natural specimens of cubanite and compared with the corresponding spectra for chalcopyrite. Synchrotron X-ray photoelectron spectra of surfaces prepared by fracture under ultra-high vacuum revealed some clear differences for the two minerals, most notably those reflecting their different structures. In particular, the concentration of the low binding energy S species formed at cubanite fracture surfaces was approximately double that produced at chalcopyrite surfaces. However, the core electron binding energies for the two S environments in cubanite were not significantly different, and were similar to the corresponding values for the single environment in chalcopyrite. High binding energy features in the S 2p and Cu 2p spectra were not related to surface species produced either by the fracture or by oxidation, and most probably arose from energy loss due to inter-band excitation. Differences relating to the Fe electronic environments were detectable, but were smaller than expected from some of the observed physical properties and Mössbauer spectroscopic parameters for the two minerals. X-ray absorption and photoelectron spectra together with the calculated densities of states for cubanite confirmed an oxidation state of CuI in the mineral. It was concluded that the best formal oxidation state representation for cubanite is CuI(Fe2)VS3-II.
dc.identifier.citationPhysics and Chemistry of Minerals, 2010; 37(6):389-405
dc.identifier.doi10.1007/s00269-009-0341-z
dc.identifier.issn0342-1791
dc.identifier.issn1432-2021
dc.identifier.orcidSkinner, W.M. [0000-0002-9606-023X]
dc.identifier.urihttps://hdl.handle.net/1959.8/159133
dc.language.isoen
dc.publisherSpringer
dc.relation.fundingARC
dc.relation.fundingGovernment of South Australia
dc.relation.fundingAMIRA International
dc.rightsCopyright 2009 Springer-Verlag
dc.source.urihttps://doi.org/10.1007/s00269-009-0341-z
dc.subjectbornite
dc.subjectchalcopyrite
dc.subjectcubanite
dc.subjectNEXAFS spectroscopy
dc.subjectXPS
dc.titleAn X-ray photoelectron and absorption spectroscopic investigation of the electronic structure of cubanite, CuFe2S3
dc.typeJournal article
pubs.publication-statusPublished
ror.mmsid9915910604501831

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