Published January 1957
| Published
Journal Article
Open
The Effects of H_2O in Silicate Systems
- Creators
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Wasserburg, G. J.
Chicago
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Abstract
A theoretical discussion of the role of water in simple silicate melts is presented. It is shown that to a good approximation in the region T ≈ 1,000° C., P < 2.3 X 10^3 bars, both the solubility of water in an NaAlSi_3O_8 melt and the depression of the freezing point of albite from such a melt are grossly governed by a perfect-solution law. A more detailed theory is presented in which the entropy of mixing for an ideal mixture of the bridging oxygen atoms of the silicate with the oxygen atoms of the water is calculated. This model is shown to be in good agreement with the observed phase diagram of the NaAlSi_3O_8-H_2O system.
Additional Information
© 1957 University of Chicago Press. Manuscript received March 23, 1956. The author wishes to thank B. Ray, R. Jahns, A. B. C. Engel, S. Epstein, and G. Turrell for their interest and discussion of this work.Attached Files
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