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Thermochemistry of tetrahedrite-tennantite fahlores

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The Stability of Minerals

Part of the book series: The Mineralogical Society Series ((MIBS,volume 3))

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Abstract

In this chapter some of the methods used in constructing models for the thermodynamic mixing properties of multicomponent solid solutions will be illustrated using the mineral tetrahedrite-tennantite as an example. In the case of this complex sulphosalt, or the more common oxide and silicate solid solutions (e.g. spinels, rhombohedral oxides, and pyroxenes), accurate models for activity-composition relations are required to construct internally consistent thermodynamic databases for the common rock-forming minerals (cf Berman, 1988; Sack and Ghiorso, 1989; Sack and Ghiorso, 1991a; Sack and Ghiorso, 1991b; Ghiorso, 1990a. It is usually not possible to construct such a database from considerations of end-member properties alone, because there are insufficient, and often conflicting constraints on the standard state properties of all of the end-member components that govern exchange reactions involving solid solutions. Moreover, practical considerations require that constraints on mixing and standardstate properties be evaluated in concert, if consistent interpretations of natural phenomena are to be achieved.

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© 1992 Geoffrey D. Price, Nancy L. Ross and the contributors

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Sack, R.O. (1992). Thermochemistry of tetrahedrite-tennantite fahlores. In: Price, G.D., Ross, N.L. (eds) The Stability of Minerals. The Mineralogical Society Series, vol 3. Springer, Dordrecht. https://doi.org/10.1007/978-0-585-27578-9_7

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  • DOI: https://doi.org/10.1007/978-0-585-27578-9_7

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-0-412-44150-9

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