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The mechanism of reequilibration of solids in the presence of a fluid phase

, and . Journal of Solid State Chemistry, 180 (5): 1783-1786 (2007)
DOI: DOI: 10.1016/j.jssc.2007.03.023

Abstract

The preservation of morphology (pseudomorphism) and crystal structure during the transformation of one solid phase to another is regularly used as a criterion for a solid-state mechanism, even when there is a fluid phase present. However, a coupled dissolution-reprecipitation mechanism also preserves the morphology and transfers crystallographic information from parent to product by epitaxial nucleation. The generation of porosity in the product phase is a necessary condition for such a mechanism as it allows fluid to maintain contact with a reaction interface which moves through the parent phase from the original surface. We propose that interface-coupled dissolution-reprecipitation is a general mechanism for reequilibration of solids in the presence of a fluid phase.

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ScienceDirect - Journal of Solid State Chemistry : The mechanism of reequilibration of solids in the presence of a fluid phase

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