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Phase Equilibria in System CaO-CO_2-H_2O and Related Systems, with Implications for Crystal Growth of Calcite and Apatite

Wyllie, Peter J. (1967) Phase Equilibria in System CaO-CO_2-H_2O and Related Systems, with Implications for Crystal Growth of Calcite and Apatite. Journal of the American Ceramic Society, 50 (1). pp. 43-46. ISSN 0002-7820. http://resolver.caltech.edu/CaltechAUTHORS:20130821-141638115

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Abstract

Conditions for crystallization of calcite from melts in the presence of a vapor or gaseous phase are reviewed to provide possible guidelines for growth of calcite. Phase equilibrium data for the system CaO-CO_2 show that to precipitate calcite from molten CaCO_3 the temperature must be above 1230° C and excess CO2 must be present at pressures greater than 39.5 bars. Phase equilibrium data for the system CaO-CO_2-H_2O show that calcite can be precipitated from melts at 650°C in the presence of an aqueous vapor phase at 10 bars or more. Crystallization can be induced either by introducing temperature variations, or by changing the composition of the coexisting aqueous vapor phase under isobaric, isothermal conditions. The system CaO-MgO-CO_2-H_2O is used to show that doped calcite crystals, Ca_xR_(1-x)CO_3, could be precipitated, with precisely controlled compositions, from melts in the system CaO-RO-CO_2-H_2O. Apatite phase relations are also presented.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1111/j.1151-2916.1967.tb14969.x DOIArticle
http://onlinelibrary.wiley.com/doi/10.1111/j.1151-2916.1967.tb14969.x/abstractPublisherArticle
Additional Information:© 1967 American Ceramic Society. Presented at the Sixty-Sixth Annual Meeting, The American Ceramic Society, Chicago, Ill., April 20, 1964 (Basic Science Division, No. 4-B-64). Contribution No. 64-77 from the College of Mineral Industries, The Pennsylvania State University. This work was supported in part by the National Science Foundation under Grants GP-1870 and GP-4910; by the Department of Scientific and Industrial Research (England); and by Advanced Projects Research Agency Contract SD-132. The author gratefully acknowledges the help of D. M. Roy who read the manuscript and contributed useful comments.
Funders:
Funding AgencyGrant Number
NSFGP-1870
NSFGP-4910
Department of Scientific and Industrial Research (UK)UNSPECIFIED
Advanced Projects Research AgencySD-132
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Pennsylvania State University College of Mineral Industries 64-77
Record Number:CaltechAUTHORS:20130821-141638115
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20130821-141638115
Official Citation:WYLLIE, P. J. (1967), Phase Equilibria in System CaO-CO2-H2O and Related Systems, with Implications for Crystal Growth of Calcite and Apatite. Journal of the American Ceramic Society, 50: 43–46. doi: 10.1111/j.1151-2916.1967.tb14969.x
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:40758
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:20 Sep 2013 23:23
Last Modified:20 Sep 2013 23:23

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