Studies of the growth and dissolution kinetics of the CaCO3 polymorphs calcite and aragonite II. The influence of divalent cation additives on the growth and dissolution rates
| Autor: | H. Dabringhaus, Astrid Gutjahr, R. Lacmann |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
inorganic chemicals
Calcite chemistry.chemical_classification Precipitation (chemistry) Chemistry Aragonite Inorganic chemistry Kinetics engineering.material Condensed Matter Physics Ion Divalent Inorganic Chemistry chemistry.chemical_compound Transition metal Materials Chemistry engineering Dissolution |
| Zdroj: | Journal of Crystal Growth. 158:310-315 |
| ISSN: | 0022-0248 |
| Popis: | The influence of the divalent cations Fe2+, Cu2+, Zn2+, Mg2+, Sr2+, and Ba2+ on the growth and dissolution rates of calcite and aragonite has been studied. In most cases the results can be interpreted by a reversible adsorption of the impurity ions at kinks sites according to the Langmuir-Volmer model. Ions of the transition metals show a stronger inhibition than earth alkaline ions. Mg2+ and Fe2+ have no influence on growth and dissolution of aragonite. Further, Cu2+ and Zn2+ have a stronger effect on calcite, while Sr2+ and Ba2+ are more effective on aragonite. Results are used to show consequences for the polymorphic precipitation of CaCO3. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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