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    Volume-Based Thermoelasticity: Compressibility of Mineral-Structured Materials

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    Fulltext not available
    Authors
    Glasser, Leslie
    Date
    2010
    Type
    Journal Article
    
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    Citation
    Glasser, Leslie. 2010. Volume-Based Thermoelasticity: Compressibility of Mineral-Structured Materials. Journal of Physical Chemistry C 114: pp. 11248-11251.
    Source Title
    Journal of Physical Chemistry C
    DOI
    10.1021/jp101512f
    ISSN
    1932-7447
    Faculty
    Nanochemistry Research Institute (NRI)
    Faculty of Science and Engineering
    School
    Nanochemistry Research Institute (Research Institute)
    URI
    http://hdl.handle.net/20.500.11937/18349
    Collection
    • Curtin Research Publications
    Abstract

    Thermodynamic properties, such as entropy among others, have been shown to correlate well with formula volume, thus permitting prediction of these properties on the basis of chemical formula and density alone, with no structural detail required. We here extend these studies to the thermoelastic property of isothermal compressibility of a wide range of materials. We show that compressibility is strongly linearly correlated with formula volume per atom pair, Vpr, within selected groups of materials (silicate clinopyroxenes, chalcopyrites, perovskites, transition metal diborides, spinels; these structurally related groups are selected on the basis of availability of experimental data). The groups are clearly distinguished by their "crumple" coefficients, w; that is, by the slopes of plots of their compressibilities versus their ion-pair volumes. The "crumple" coefficients decrease in the sequence of these groups listed above, and explanations are offered for the observed sequence: from flexible framework structures which crumple readily to rigid close-packed oxides and borides. This is believed to be the first examination of thermoelastic data across a wide range of structure groups, providing some broad insight into the factors influencing the elasticity of materials. The correlations may be used either to estimate or to check the compressibility of a material within a group.

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