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
Official URL: http://www.elsevier.com/locate/chemgeo
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.
|Uncontrolled Keywords:||Growth mechanisms; Growth rates; Supersaturation; Barite; Celestite; Solid solution|
|Subjects:||Sciences > Geology > Crystallography|
|Deposited On:||08 Feb 2012 10:49|
|Last Modified:||08 Feb 2012 10:49|
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