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Crystallization of Aragonite from Vaterite Precursor during Various Refluxing Times

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Abstract:

CaCO3 polymorphs are intensively studied due to their importance in the nature and the widespread use in the industry as well. This work is dealing with the crystallization of aragonite from vaterite dispersion during the refluxation at 100°C. The characterization of CaCO3 polymorphs during vaterite transformation was performed with Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and X-ray powder diffraction (XRPD). The influence of the different refluxing times on the aragonite crystallization was discussed. The purest aragonite, 70.7(2) wt.%, was synthetized in the sample refluxed for 60 minutes. Prolonged refluxation strongly affected aragonite crystals with gradual transformation into calcite.

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Periodical:

Advanced Materials Research (Volume 1119)

Pages:

466-470

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1119.466

Citation:

Cite this paper

Online since:

July 2015

Authors:

Radek Ševčík*, Petra Mácová, Marta Pérez-Estébanez

Keywords:

Aragonite, CaCO3, Crystallization, FTIR, SEM

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* - Corresponding Author

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