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    Direct observations of mineral-fluid reactions using atomic force microscopy: The specific example of calcite

    Access Status
    Fulltext not available
    Authors
    Ruiz-Agudo, E.
    Putnis, Christine
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    Ruiz-Agudo, E. and Putnis, C. 2012. Direct observations of mineral-fluid reactions using atomic force microscopy: The specific example of calcite. Mineralogical Magazine. 76 (1): pp. 227-253.
    Source Title
    Mineralogical Magazine
    DOI
    10.1180/minmag.2012.076.1.227
    ISSN
    0026-461X
    School
    Department of Chemistry
    URI
    http://hdl.handle.net/20.500.11937/4060
    Collection
    • Curtin Research Publications
    Abstract

    Atomic force microscopy (AFM) enables in situ observations of mineral fluid reactions to be made at a nanoscale. During the past 20 years, the direct observation of mineral surfaces at molecular resolution during dissolution and growth has made significant contributions toward improvements in our understanding of the dynamics of mineral fluid reactions at the atomic scale. Observations and kinetic measurements of dissolution and growth from AFM experiments give valuable evidence for crystal dissolution and growth mechanisms, either confirming existing models or revealing their limitations. Modifications to theories can be made in the light of experimental evidence generated by AFM. Significant changes in the kinetics and mechanisms of crystallization and dissolution processes occur when the chemical and physical parameters of solutions, including the presence of impurity molecules or background electrolytes, are altered. Calcite has received considerable attention in AFM studies due to its central role in geochemical and biomineralization processes. This review summarizes the extensive literature on the dissolution and growth of calcite that has been generated by AFM studies, including the influence of fluid characteristics such as supersaturation, solution stoichiometry, pH, temperature and the presence of impurities.

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