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dc.contributor.authorGan, B.
dc.contributor.authorTaylor, Zoe
dc.contributor.authorXu, B.
dc.contributor.authorVan Riessen, Arie
dc.contributor.authorHart, Robert
dc.contributor.authorWang, Xiaodong
dc.contributor.authorSmith, P.
dc.identifier.citationGan, Bee K. and Taylor, Zoe and Xu, Bingan and van Riessen, Arie and Hart, Robert D. and Wang, Xiaodong and Smith, Peter. 2013. Quantitative phase analysis of bauxites and their dissolution products. International Journal of Mineral Processing. 123 (10): pp. 64-72.

Quantitative phase analysis for four bauxite samples sourced from different geological regions was conducted with Rietveld refinement of synchrotron sourced X-ray diffraction (XRD) data. Minor and trace phases were concentrated using (i) caustic leaching to selectively remove phases such as gibbsite, boehmite and kaolinite and (ii) dithionite–citrate–bicarbonate leaching to selectively remove the iron oxide phases such as goethite and hematite, and reanalysed. Bauxites are normally recognised as very difficult samples for quantitative phase analysis (QPA). The use of synchrotron XRD in this paper allowed characterisation with QPA, crystallite size determination and elemental substitution in some phases. Elemental composition analysis by X-ray fluorescence demonstrated close agreement with the diffraction data and allowed an estimate of the composition of the non-crystalline component of the bauxite samples. Other characterisation techniques used include thermogravimetric/differential scanning calorimetry to determine the phase transitions and mass loss, and transmission electron microscopy/energy dispersive spectroscopy to capture the morphology of the crystallites in the bauxite samples.

dc.subjectSynchrotron XRD
dc.subjectQuantitative Rietveld
dc.titleQuantitative phase analysis of bauxites and their dissolution products
dc.typeJournal Article
dcterms.source.titleInternational Journal of Mineral Processing
curtin.accessStatusFulltext not available

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