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Updated: Aug 17, 2025

Calcium Carbonate Formation in the Presence of Biopolymeric Additives
Published on: May 14, 2019
The Kinetics of Aragonite Formation from Solution via Amorphous Calcium Carbonate
Simon M Clark1,2, Vili Grigorova1, Bruno Colas1,2
1School of Engineering, Faculty of Science and Engineering, Macquarie University, North Macquarie Park, Shellharbour, NSW 2109, Australia.
Abstract:
Magnesium doped Amorphous Calcium Carbonate was synthesised from precursor solutions containing varying amounts of calcium, magnesium, H2O and D2O. The Mg/Ca ratio in the resultant Amorphous Calcium Carbonate was found to vary linearly with the Mg/Ca ratio in the precursor solution. All samples crystallised as aragonite. No Mg was found in the final aragonite crystals. Changes in the Mg to Ca ratio were found to only marginally effect nucleation rates but strongly effect crystal growth rates. These results are consistent with a dissolution-reprecipitation model for aragonite formation via an Amorphous Calcium Carbonate intermediate.
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