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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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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 hat 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:24 Sep 2015 06:54

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