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Supersaturation functions in binary solid solution–aqueous solution systems

Astilleros García-Monge, José Manuel and Pina Martínez, Carlos Manuel and Fernández Díaz, Lourdes and Putnis, Andrew (2003) Supersaturation functions in binary solid solution–aqueous solution systems. Geochimica et cosmochimica acta, 67 (9). pp. 1601-1608. ISSN 0016-7037

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Abstract

In this paper, we present a brief review of the thermodynamic equilibrium of binary solid
solution–aqueous solution (SS-AS) systems and derive an expression that allows us to evaluate the supersaturation
or undersaturation of a given aqueous solution with respect to the whole range of solid compositions:
the δ(x) function. Such an expression is based on the two conditions that define the SS-AS thermodynamic
equilibrium. The derivation of the new supersaturation function, δ(x), was made by considering in detail the
compositional relationships between solid and aqueous phases. To represent the new formulation on Lippmann
diagrams, we have defined a new thermodynamic concept: the “actual activity.” In addition, we show
how our supersaturation function behaves for both ideal and subregular solid solutions. The behaviour and
applicability of both the δ(x) function and a previous supersaturation function, β(x), defined by Prieto et al.
(1993), is discussed.


Item Type:Article
Uncontrolled Keywords:Thermodynamic equilibrium; Binary solid solution–aqueous solution; Crystalization
Subjects:Sciences > Geology > Crystallography
ID Code:14496
Deposited On:01 Feb 2012 12:13
Last Modified:01 Feb 2012 12:13

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