Catalysis, inhibition, and the calcite-aragonite problem; [Part] 1, The aragonite-calcite transformation
Year: 1968
Type: article
Abstract: The kinetics of the aragonite-calcite transformation were studied in aqueous solution to determine the factors involved in the process of calcite crystallization and the controlling diagenetic conditions for the aragonite-calcite transformation. The reaction involved the solution and equilibration of aragonite with the solution and the subsequent nucleation and growth of calcite. The extent of reaction was determined by X-ray diffraction. Data suggest that calcite nucleation occurs on aragonite surface, whereas growth occurs on point or line defects. Catalysis by CO ~2~ , CaCl ~2~ , and inhibition by KOH indicate a fundamental reaction involving Ca (super ++) and HCO ~3~ (super -) . Calcite crystallization is strongly inhibited by Mg (super ++) and less so by SO ~4~ (super \--) .
Source: American Journal of Science
DOI: 10.2475/ajs.266.2.65
Authors: J. L. Bischoff, W. S. Fyfe
Language: English
Subfield: Biomaterials
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2322818437