Thermodynamics of the amphiboles: Fe-Mg cummingtonite solid solutions

A thermodynamic solution model for the ferromagnesian (Fe-Mg) amphiboles is developed. The model accounts explicitly for intersite nonconvergent cation ordering of Fe2positive and Mg between octahedral M1, M2, M3, and M4 sites and intrasite interaction energies arising from size-mismatch of unlike c...

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Bibliographic Details
Published in:The American mineralogist 1995-05, Vol.80 (5-6), p.502
Main Authors: Ghiorso, Mark S, Evans, Bernard W, Hirschmann, Marc M, Yang, Hexiong
Format: Article
Language:English
Subjects:
Cations
Chemistry
Iron
Minerals
Thermodynamics
Online Access:Get full text
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Summary:A thermodynamic solution model for the ferromagnesian (Fe-Mg) amphiboles is developed. The model accounts explicitly for intersite nonconvergent cation ordering of Fe2positive and Mg between octahedral M1, M2, M3, and M4 sites and intrasite interaction energies arising from size-mismatch of unlike cations.
ISSN:0003-004X
1945-3027
DOI:10.2138/am-1995-5-611