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Titre: Os polimorfos de carbonato de cálcio : uma síntese fácil de aragonita
Autre(s) titre(s): The polymorphs of calcium carbonate : an easy synthesis of aragonite
Auteur(s): Bessler, Karl Eberhard
Rodrigues, Laécio C.
Assunto:: Polimorfismo
Carbonato de cálcio
Síntese
Date de publication: 2008
Editeur: Sociedade Brasileira de Química
Référence bibliographique: BESSLER, Karl E.; RODRIGUES, Laécio C. Os polimorfos de carbonato de cálcio: uma síntese fácil de aragonita. Química Nova, v. 31, n. 1, p. 178-180, 2008. DOI: https://doi.org/10.1590/S0100-40422008000100032. Disponível em: https://www.scielo.br/j/qn/a/6kLsNC9bf58vMk6nnq4bVbJ/?lang=pt#. Acesso em: 06 jun. 2022.
Résumé: Aragonite is a metastable polymorph of calcium carbonate. The calcareous exoskeletons of some organisms like corals or molluscs consist essentially of aragonite. The questions of how, and why these organisms prefer the thermodynamically unstable aragonite for the construction of their hard shells are discussed. The importance of the biomineralization process for the development of new materials is outlined. In the experimental part, a very simple synthesis of polycrystalline aragonite is performed, using carbonated mineral water available at the market. The synthesized aragonite is easily identified by its infrared spectrum.
metadata.dc.description.unidade: Instituto de Química (IQ)
Licença:: Química Nova - This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY NC). Fonte: https://www.scielo.br/j/qn/a/6kLsNC9bf58vMk6nnq4bVbJ/?lang=pt#. Acesso em: 06 jun. 2022.
DOI: https://dx.doi.org/10.1590/S0100-40422008000100032
Collection(s) :Artigos publicados em periódicos e afins

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