THE CRYSTALLIZATION OF CALCIUM-CARBONATE IN ARTIFICIAL SEAWATER - ROLE OF THE SUBSTRATE

Authors
SABBIDES TG KOUTSOUKOS PG
Citation
Tg. Sabbides et Pg. Koutsoukos, THE CRYSTALLIZATION OF CALCIUM-CARBONATE IN ARTIFICIAL SEAWATER - ROLE OF THE SUBSTRATE, Journal of crystal growth, 133(1-2), 1993, pp. 13-22
Citations number
45
Categorie Soggetti
Crystallography
Journal title
Journal of crystal growth → ACNP
ISSN journal
00220248
Volume
133
Issue
1-2
Year of publication
1993
Pages
13 - 22
Database
ISI
SICI code
0022-0248(1993)133:1-2<13:TCOCIA>2.0.ZU;2-5
Abstract
The formation of calcium carbonate in artificial seawater was investig ated at conditions of constant solution supersaturation at pH 8.50 and 25-degrees-C. It was found that the only phase growing was aragonite irrespective of the substrate. The key factor is the magnesium concent ration in solution. The nucleating capability was found to be aragonit e > vaterite > calcite, while the apparent reaction orders were rather high for the heterogeneous nucleation of aragonite. The polynuclear m odel gave a satisfactory fit for the overgrowth on calcite and vaterit e.