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Phase-Selective Synthesis of Calcium Carbonate Polymorphs

Published online by Cambridge University Press:  15 February 2011

Kenneth M. Doxsee  and
Robin L. Saulsbery
Kenneth M. Doxsee
Affiliation:
Department of Chemistry, University of Oregon, Eugene, OR 97403
Robin L. Saulsbery
Affiliation:
Department of Chemistry, University of Oregon, Eugene, OR 97403
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Abstract

Through the use of solubilizing agents, simple salt metathesis reactions may be translated from aqueous solution to the milieu of organic solvents. When applied to the crystallization of calcium carbonate through the reaction of calcium chloride with sodium bicarbonate in “complexation-mediated” crystallization leads to the selective formation of a metastable phase, vaterite, rather than to calcite, the phase obtained from aqueous solution. Impacts on the formation of the third anhydrous phase of calcium carbonate, aragonite, are also noted. These studies suggest an additional mechanism whereby Nature may control the morphology and phase of the calcium carbonate biominerals.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 489: Symposium K – Materials Science of the Cell , 1997 , 161
Copyright
Copyright © Materials Research Society 1998

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