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Cd2+ en calcita: Cristalización de la solución sólida (Cd,Ca)C03

Fernández González, Ángeles and Prieto Rubio, Manuel and López Andrés, Sol and Putnis, Andrew (1996) Cd2+ en calcita: Cristalización de la solución sólida (Cd,Ca)C03. Geogaceta, 20 (7). pp. 1546-1549. ISSN 0213-683X

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Abstract

The complete series of the otavite-calcite solid has been synthesized by counter diffusion of
CdClz + CaClz and CaCO] through a column of silica hydrogel. In this system there is a strong preferential
partitioning of Cd in the solid phase, and only a very narrow range of aqueous phase compositions can
coexist in equilibrium with intermediate solid solutions, i.e., the (Cd, Ca)C03 solid solution tend to
crystallize from aqueous solutions in a bimodal way. At high supersaturations, the range of aqueous
solutions from which intermediate solid solutions can nucleate expands, but the bimodal effect remains.
This bimodal behaviour accounts for the development of high gradient composistional zoning and
oscillatory zoning during the growth process.

Item Type:Article
Uncontrolled Keywords:Solid solution, Zoning, Oscillatory zoning, Crystal growth, Calcite, Otavite
Subjects:Sciences > Geology > Crystallography
ID Code:14886
Deposited On:18 Apr 2012 11:53
Last Modified:18 Apr 2012 11:53

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