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The growth mechanisms of solid solutions crystallising from aqueous solutions

Pina Martínez, Carlos Manuel and Putnis, Andrew and Astilleros García-Monge, José Manuel (2004) The growth mechanisms of solid solutions crystallising from aqueous solutions. Chemical geology, 204 . pp. 145-161. ISSN 0009-2541

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Abstract

In this paper, we present a generalisation of the classical growth rate equations to the case of crystallisation in solid
solution–aqueous solution (SS-AS) systems. In these new equations, basic growth parameters, interfacial free energy and
supersaturation are functions of the solid composition. Therefore, each equation describes, for a given aqueous solution, a
growth rate distribution as a function of the solid composition. Different crystal growth models such as two-dimensional
nucleation or spiral growth mechanisms provide different growth rate distributions. We have studied the general behaviour of
growth rate equations in solid solution–aqueous solution (SS-AS) systems. Finally, we have applied the generalised growth rate
equations to the BaxSr1xSO4–H2O SS-AS system. It allowed us to determine relationships between growth mechanisms and
solid composition in such a model system. The result of our calculations were discussed and compared with previous
experimental work on the BaxSr1xSO4–H2O SS-AS system.


Item Type:Article
Uncontrolled Keywords:Growth mechanisms; Growth rates; Supersaturation; Barite; Celestite; Solid solution
Subjects:Sciences > Geology > Crystallography
ID Code:14538
Deposited On:08 Feb 2012 10:49
Last Modified:08 Feb 2012 10:49

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