Abstract
Calcium carbonate forms scales, geological deposits, biominerals, and ocean sediments. Huge amounts of carbon dioxide are retained as carbonate ions, and calcium ions represent a major contribution to water hardness. Despite its relevance, little is known about the precipitation mechanism of calcium carbonate, and specified complex crystal structures challenge the classical view on nucleation considering the formation of metastable ion clusters. We demonstrate that dissolved calcium carbonate in fact contains stable prenucleation ion clusters forming even in undersaturated solution. The cluster formation can be characterized by means of equilibrium thermodynamics, applying a multiple-binding model, which allows for structural preformation. Stable clusters are the relevant species in calcium carbonate nucleation. Such mechanisms may also be important for the crystallization of other minerals.
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- Financial support by the German Science Foundation priority program 1117 “Principles of Biomineralization” and the Max Planck Society are gratefully acknowledged. We thank M. Antonietti (MPI) and P. Bowen (Ecole Polytechnique Fédérale de Lausanne Switzerland) for valuable discussions on the manuscript A. Verch (MPI) for experimental assistance and O. Paris and I. Zenke (both MPI) for SAXS analysis. D.G. thanks T. Ketterer and J. Thomas of Deutsche Metrohm for technical assistance.
Dates
Type | When |
---|---|
Created | 16 years, 8 months ago (Dec. 18, 2008, 5:48 p.m.) |
Deposited | 1 year, 7 months ago (Jan. 10, 2024, 4:29 a.m.) |
Indexed | 1 hour, 33 minutes ago (Aug. 21, 2025, 11:52 a.m.) |
Issued | 16 years, 8 months ago (Dec. 19, 2008) |
Published | 16 years, 8 months ago (Dec. 19, 2008) |
Published Print | 16 years, 8 months ago (Dec. 19, 2008) |
@article{Gebauer_2008, title={Stable Prenucleation Calcium Carbonate Clusters}, volume={322}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.1164271}, DOI={10.1126/science.1164271}, number={5909}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Gebauer, Denis and Völkel, Antje and Cölfen, Helmut}, year={2008}, month=dec, pages={1819–1822} }