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Thermodynamics of Mixing in Silicate Glasses and Melts

  • A. Navrotsky
Chapter
Part of the Advances in Physical Geochemistry book series (PHYSICAL GEOCHE, volume 1)

Abstract

In recent years great progress has been made in applying thermodynamics to geology, that is, in obtaining and using thermodynamic data to predict and interpret petrologic phase relations. However, the application of thermodynamics has often been limited by the lack of reliable thermochemical data and the use of oversimplified models to derive approximate equations. This is especially true for equilibria involving silicate melts, for which, at present, there are still much less data than for crystalline phases. The purpose of this paper is to review both the available data and some concepts needed to begin to understand silicate melt thermodynamics. Although thermodynamics can be treated as a purely phenomenological subject dealing with bulk properties, much additional useful insight can be gained by correlating thermodynamic properties with structure on an atomic scale through statistical models. For silicate melts the questions of structure are extremely complex and only partially answered, but, inasmuch as possible, I shall point out the structural basis of observed thermodynamic behavior. This review is meant to be a relatively brief overview stressing recent data and new approaches rather than an exhaustive survey of the literature.

Keywords

Heat Capacity Glass Transition Temperature Silicate Glass Supercooled Liquid Aluminosilicate Glass 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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© Springer-Verlag New York Inc 1981

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  • A. Navrotsky

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