气候变化领域集成服务门户(CCPortal): Stable prenucleation calcium carbonate clusters

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DOI	10.1126/science.1164271
	Stable prenucleation calcium carbonate clusters
	Gebauer D.; Völkel A.; Cölfen H.
发表日期	2008
ISSN	0036-8075
起始页码	1819
结束页码	1822
卷号	322 期号:5909
英文摘要	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.
英文关键词	calcium carbonate; mineral; calcium carbonate; carbon dioxide; cation; crystal structure; crystallization; hardness; nucleation; precipitation (chemistry); thermodynamics; article; crystal structure; entropy; equilibrium constant; precipitation; priority journal; thermodynamics; water hardness; Calcification, Physiologic; Calcium; Calcium Carbonate; Carbonates; Crystallization; Hydrogen-Ion Concentration; Ions; Models, Chemical; Molecular Structure; Physicochemical Phenomena; Precipitation; Solutions; Thermodynamics
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243791
作者单位	Max Planck Institute of Colloids and Interfaces, Research Campus Golm, Am Mühlenberg 1, D-14424 Potsdam, Germany
推荐引用方式 GB/T 7714	Gebauer D.,Völkel A.,Cölfen H.. Stable prenucleation calcium carbonate clusters[J],2008,322(5909).
APA	Gebauer D.,Völkel A.,&Cölfen H..(2008).Stable prenucleation calcium carbonate clusters.Science,322(5909).
MLA	Gebauer D.,et al."Stable prenucleation calcium carbonate clusters".Science 322.5909(2008).