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    Rates and mechanisms of calcite growth and its inhibition by strontium

    Access Status
    Fulltext not available
    Authors
    Stack, A.
    Bracco, J.
    Raiteri, Paolo
    Gale, Julian
    Date
    2012
    Type
    Conference Paper
    
    Metadata
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    Citation
    Stack, A. and Bracco, J. and Raiteri, P. and Gale, J. 2012. Rates and mechanisms of calcite growth and its inhibition by strontium, in Proceedings of the 244th ACS National Meeting and Exposition, Aug 19-23 2012. Philadelphia, Pennsylvania: ACS.
    Source Title
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
    Source Conference
    244th National Fall Meeting of the American-Chemical-Society (ACS)
    ISSN
    0065-7727
    School
    Department of Chemistry
    URI
    http://hdl.handle.net/20.500.11937/16817
    Collection
    • Curtin Research Publications
    Abstract

    In this work, calcite (calcium carbonate) growth is examined from computational, experimental and theoretical perspectives, specifically molecular dynamics rare event theory simulations and in situ atomic force microscopy (AFM). Simulations of attachment and detachment of ions to steps reveal a complex reaction chemistry, and the form of these reactions are begun to be incorporated into analytical expressions used to fit the monomolecular step velocities as a function of saturation index, aqueous calcium-to-carbonate ion concentration ratio, and aqueous strontium concentration. Regarding the latter, the effect of the impurity on growth rates is examined and it is found that the amount of strontium necessary to poison growth correlates with the aqueous calcium concentration, but not carbonate. This suggests that strontium interferes with the attachment of aqueous calcium ions.

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