4 years ago

Impact of Citrate Ions on the Nucleation and Growth of Anhydrous CaCO3

Impact of Citrate Ions on the Nucleation and Growth of Anhydrous CaCO3
J. D. Rodriguez-Blanco, D. J. Tobler, G. Montanari, S. L. S. Stipp, N. Bovet
With increasing citrate (CIT) concentration, the induction time for anhydrous CaCO3 nucleation increases while the crystal growth rate decreases. Both vaterite and calcite form at CIT/Ca ≤ 50%, with vaterite spheres becoming smaller and calcite crystals more elongated as CIT increases. At CIT/Ca > 50%, vaterite formation is completely inhibited and only elongated calcite crystals form. Overall, the onset of nucleation varies more at high % CIT/Ca, while crystal growth rates change more dramatically at low % CIT/Ca.

Publisher URL: http://dx.doi.org/10.1021/acs.cgd.7b00796

DOI: 10.1021/acs.cgd.7b00796

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