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    Insights into the crystal and aggregate structure of Fe3+ oxide/silica co-precipitates

    Access Status
    Fulltext not available
    Authors
    Dyer, Laurence
    Chapman, K.
    English, P.
    Saunders, M.
    Richmond, William
    Date
    2012
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Dyer, Laurence G. and Chapman, Karena W. and English, Phillip and Saunders, Martin and Richmond, William R. 2012. Insights into the crystal and aggregate structure of Fe3+ oxide/silica co-precipitates. American Mineralogist. 97 (1): pp. 63-69.
    Source Title
    American Mineralogist
    DOI
    10.2138/am.2011.3874
    ISSN
    0003004X
    URI
    http://hdl.handle.net/20.500.11937/32419
    Collection
    • Curtin Research Publications
    Abstract

    Structural characteristics of iron (III) oxide/silica co-precipitates were investigated. The association between these materials is relevant to practically all natural aqueous systems due to the prevalence of iron and silicon in the earth’s crust. Crystallographic information is very difficult to obtain from these precipitates due to the nanocrystalline nature of ferrihydrite and the amorphous structure of precipitated silica. Several previously undetermined key insights were gained into the structure of iron oxide/silica co-precipitates through this examination. The distribution of iron and silicon throughout co-precipitate particles is illustrated along with the influence of their association. Evidence to the governing factor behind differences in apparent crystallinity is also presented. This information culminates in the formulation of a precipitation pathway, displaying the formation of the co-precipitates.

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