Tuning the Incorporation of Magnesium into Calcite during Its Crystallization from Additive-Free Aqueous Solution
| Autor: | Esther Amstad, Jeroen A. van Bokhoven, Huachuan Du, Jacinta Xto, Thomas Huthwelker, Camelia N. Borca |
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| Rok vydání: | 2019 |
| Předmět: |
Calcite
Aqueous solution Materials science 010405 organic chemistry Magnesium chemistry.chemical_element General Chemistry 010402 general chemistry Condensed Matter Physics 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound Temperature and pressure chemistry Chemical engineering law General Materials Science Crystallization |
| Zdroj: | Crystal Growth & Design. 19:4385-4394 |
| ISSN: | 1528-7505 1528-7483 |
| DOI: | 10.1021/acs.cgd.9b00179 |
| Popis: | Under ambient conditions, marine organisms are able to synthesize a variety of functional materials, ranging from eye lenses to protective shells through the meticulous control over magnesium incorporation into calcite during its crystallization. The mechanistic understanding of how they achieve such exquisite control, at a constant magnesium-to-calcium ratio and at ambient conditions, is important in the development of bioinspired functional materials. However, the replication of these processes in the laboratory is still challenging. Herein, we present a systematic study on how to tune magnesium incorporation into calcite and polymorph selection in the Ca–Mg–CO3 system through the precise control of the inorganic solutions chemistry at ambient conditions of temperature and pressure, and at a magnesium-to-calcium ratio of 5:1, which is analogous to the ratio found in most seas. By varying the pH, cation-to-anion ratio, and solution concentration, the controlled synthesis of magnesium calcites with 10–45%... |
| Databáze: | OpenAIRE |
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