On the formulation of simple mixing models for complex phases

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Authors:Powell, Roger; Holland, Tim
Author Affiliations:Primary:
University of Melbourne, Department of Geology, Victoria, Australia
Other:
University of Cambridge, United Kingdom
Volume Title:American Mineralogist
Source:American Mineralogist, 78(11-12), p.1174-1180. Publisher: Mineralogical Society of America, Washington, DC, United States. ISSN: 0003-004X
Publication Date:1993
Note:In English. 13 refs.; 4 tables
Summary:In this paper, thermodynamic mole fractions (ideal mixing activities) are formulated with ideal mixing on all sites, representing a disordered solution, and non-ideality is formulated involving enthalpic interactions involving all sites, which may be taken to account at least partially for any ordering in the structure; hornblende is used as an example. In this framework, it is shown how a-x relationships may be simplified. Moreover, the logic developed can apply to other formulations, including those in which order parameters are involved explicitly. [J.A.Z.]
Subjects:Amphibole group; Chain silicates; Clinoamphibole; Hornblende; Mathematical models; Phase equilibria; Silicates; Thermodynamic properties
Abstract Numbers:94M/3110
Record ID:1994010960
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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