Phase analysis of Australian uranium ore concentrates determined by variable temperature synchrotron powder x-ray diffraction

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dc.contributor.authorPandelus, SBen_AU
dc.contributor.authorKennedy, BJen_AU
dc.contributor.authorMurphy, GLen_AU
dc.contributor.authorBrand, HEAen_AU
dc.contributor.authorKeegan, EAen_AU
dc.contributor.authorPring, Aen_AU
dc.contributor.authorPopelka-Filcoff, RSen_AU
dc.date.accessioned2021-10-28T04:49:18Zen_AU
dc.date.available2021-10-28T04:49:18Zen_AU
dc.date.issued2021-07-22en_AU
dc.date.statistics2021-10-22en_AU
dc.description.abstractThe chemical speciation of uranium oxides is sensitive to the provenance of the samples and their storage conditions. Here, we use diffraction methods to characterize the phases found in three aged (>10 years) uranium ore concentrates of different origins as well as in situ analysis of the thermally induced structural transitions of these materials. The structures of the crystalline phases found in the three samples have been refined, using high-resolution synchrotron X-ray diffraction data. Rietveld analysis of the samples from the Olympic Dam and Ranger uranium mines has revealed the presence of crystalline α-UO2(OH)2, together with metaschoepite (UO2)4O(OH)6·5H2O, in the aged U3O8 samples, and it is speculated that this forms as a consequence of the corrosion of U3O8 in the presence of metaschoepite. The third sample, from the Beverley uranium mine, contains the peroxide [UO2(η2-O2)(H2O)2] (metastudtite) together with α-UO2(OH)2 and metaschoepite. A core–shell model is proposed to account for the broadening of the diffraction peaks of the U3O8 evident in the samples. © 2021 American Chemical Societyen_AU
dc.identifier.citationPandelus, S. B., Kennedy, B. J., Murphy, G., Brand, H. E., Keegan, E., Pring, A., & Popelka-Filcoff, R. S. (2021). Phase analysis of Australian uranium ore concentrates determined by variable temperature synchrotron powder x-ray diffraction. Inorganic Chemistry, 60(15), 11569-11578. doi:10.1021/acs.inorgchem.1c01562en_AU
dc.identifier.issn1520-510Xen_AU
dc.identifier.issue15en_AU
dc.identifier.journaltitleInorganic Chemistryen_AU
dc.identifier.pagination11569-11578en_AU
dc.identifier.urihttps://doi.org/10.1021/acs.inorgchem.1c01562en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12167en_AU
dc.identifier.volume60en_AU
dc.language.isoenen_AU
dc.publisherAmerican Chemical Societyen_AU
dc.subjectOxidesen_AU
dc.subjectUranium oresen_AU
dc.subjectX-ray diffractionen_AU
dc.subjectSynchrotronsen_AU
dc.subjectMolecular structureen_AU
dc.subjectPhase transformationsen_AU
dc.titlePhase analysis of Australian uranium ore concentrates determined by variable temperature synchrotron powder x-ray diffractionen_AU
dc.typeJournal Articleen_AU
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