Millhollen, G. L. and Wyllie, P. J. and Burnham, C. Wayne (1971) Melting relations of NaAlSi_3O_8 to 30 Kb in the presence of H_2O:CO_2 = 50:50 vapor. American Journal of Science, 271 (5). pp. 473-480. ISSN 0002-9599. doi:10.2475/ajs.271.5.473. https://resolver.caltech.edu/CaltechAUTHORS:20160127-144713306
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Abstract
Synthetic albite was reacted with oxalic acid dihydrate under oxidizing conditions in an internally-heated pressure vessel from 1 to 4 kb and in a piston-cylinder apparatus from 10 to 30 kb. Breakdown of the oxalic acid in subsolidus runs produced a vapor with H_2O:CO_2 = 50:50 in moles (X^v_(H_2O) = 0.5, neglecting solubility of solids in the vapor). The curve determined for the beginning of melting under these conditions defines a contour on the divariant solidus surface for the system NaAlSi_3O_8-H_2O-CO_2 for X^v_(H_2O) = 0.5, between the published limits for X^v_(H_2O) = 1.0 and X^v_(H_2O) = O. Addition of 50 mole percent of relatively insoluble CO_2 to NaAlSi_3O_8-H_2O at 15 kb total pressure raises the solidus temperature from 660° to 830°C. The results give no indication of increased solubility of CO_2 in NaAlSi_3O_8 liquids at pressures above 15 kb, in contrast with published results for a basalt liquid.
| Item Type: | Article | |||||||||
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| Alternate Title: | Melting relations of NaAlSi3O8 to 30 Kb in the presence of H2O:CO2 = 50:50 vapor | |||||||||
| Additional Information: | © 1971 American Journal of Science. We thank the National Science Foundation for support from grants GA-15718 and GA-1110, the Advanced Research Products Agency for the piston-cylinder apparatus, Dr. J. K. Robertson for helpful discussions during the course of the experiments, and Drs. A. L. Boettcher and R. C. Newton for critical reviews of the manuscript. | |||||||||
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| Issue or Number: | 5 | |||||||||
| DOI: | 10.2475/ajs.271.5.473 | |||||||||
| Record Number: | CaltechAUTHORS:20160127-144713306 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20160127-144713306 | |||||||||
| Official Citation: | G. L. Millhollen, P. J. Wyllie, and C. Wayne Burnham Melting relations of NaAlSi 3 O 8 to 30 Kb in the presence of H 2 O:CO 2 = 50:50 vapor Am J Sci December 1, 1971 271:473-480; doi:10.2475/ajs.271.5.473 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 64025 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Tony Diaz | |||||||||
| Deposited On: | 27 Jan 2016 23:14 | |||||||||
| Last Modified: | 10 Nov 2021 23:24 |
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