Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    X-ray diffraction line profile analysis of acid-resistant goethite in Western Australian nickel laterite ore

    Access Status
    Fulltext not available
    Authors
    Wang, X.
    Li, J.
    McDonald, R.
    Van Riessen, Arie
    Hart, R.
    Date
    2015
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Wang, X. and Li, J. and McDonald, R. and Van Riessen, A. and Hart, R. 2015. X-ray diffraction line profile analysis of acid-resistant goethite in Western Australian nickel laterite ore. Journal of Applied Crystallography. 48: pp. 814-826.
    Source Title
    Journal of Applied Crystallography
    DOI
    10.1107/S1600576715006275
    ISSN
    0021-8898
    School
    John de Laeter CoE in Mass Spectrometry
    URI
    http://hdl.handle.net/20.500.11937/12153
    Collection
    • Curtin Research Publications
    Abstract

    The goethite peaks in synchrotron and laboratory X-ray powder diffraction (XRPD) patterns of an acid-resistant nickel laterite ore sample from a site in Western Australia exhibit a 'super-Lorentzian' shape. The method for extracting the coherently scattering domain size distribution published by Leoni & Scardi [J. Appl. Cryst. (2004), 37, 629-634] is adapted to fit the asymmetric goethite peak profiles, allowing the refinement of lattice parameters for multiple goethite structural models while maintaining their relationships. The anisotropic peak broadening due to the acicular shape of the goethite crystals is addressed using spherical harmonics predefined from an XRPD pattern of a synthetic goethite sample. A bimodal coherently scattering domain size distribution of goethite crystals is predicted from the goethite profile fitting and agrees with previous transmission electron microscopy findings that two goethite populations with different domain sizes and metal substitutions exist in the ore sample. The small goethite size fraction dissolved slowly during atmospheric acid leaching, while the large goethite fraction barely dissolved. Caustic pre-treatment by KOH digestion significantly enhanced the acid-leaching performance of the small goethite fraction, but had no effect on the large goethite fraction. This study demonstrates that quantitative phase analysis on designated goethite size fractions can successfully fit the super-Lorentzian shaped line profiles of natural goethite crystals with a confirmed bimodal domain size distribution.

    Related items

    Showing items related by title, author, creator and subject.

    • Size exclusion chromatography as a tool for natural organic matter characterisation in drinking water treatment
      Allpike, Bradley (2008)
      Natural organic matter (NOM), ubiquitous in natural water sources, is generated by biogeochemical processes in both the water body and in the surrounding watershed, as well as from the contribution of organic compounds ...
    • Iron oxide formation from FeCl2 solutions in the presence of uranyl (UO22+) cations and carbonate rich media
      Doornbusch, B.; Bunney, K.; Gan, B.; Jones, Franca; Gräfe, M. (2015)
      The mineral goethite (a-FeOOH) has previously been investigated as a thermodynamically stable repository for many potentially toxic metals (e.g., Cd, Pb, Cu). The substitution of uranium (U as uranyl, UO22+) for Fe, ...
    • Acid resistance of goethite in nickel laterite ore from Western Australia. Part I: The relationship between goethite morphologies and acid leaching performance
      Wang, X.; McDonald, R.; Hart, R.; Li, J.; Van Riessen, Arie (2013)
      Nickel containing goethite in laterite ores shows extreme variability in heap leaching performance. This has been difficult to characterise making utilisation of these ores for heap leaching problematic. The variability ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.