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The quartz-coesite transition
Abstract
The quartz–coesite transition curve has been determined over the temperature range 700° to 1700°C in the pressure range 20 to 40 kb. The equation for the curve is P = 19.5 + 0.0112T, where P is in kilobars and T is in degrees centigrade. The determination was made with an internally heated tungsten carbide pressure vessel utilizing talc for a pressure medium. The results of some runs on the quartz–coesite transition with an anvil apparatus are described. These data are in poor agreement with the determination cited above, and the difference is interpreted as an effect of pressure gradients in quartz–coesite runs in the anvil apparatus. Quartz could not invert to coesite in the earth at depths less than about 100 km, and it is therefore unlikely that coesite has formed in crustal rocks.
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Citations
Cited by
Chopin, C. (1984) · Contributions to Mineralogy and Petrology · doi:10.1007/bf00381838 · Cited by 1,350
The quartz ⇆ coesite transformation: A precise determination and the effects of other components
Bohlen, S. R., & Boettcher, A. L. (1982) · Journal of Geophysical Research: Solid Earth · doi:10.1029/jb087ib08p07073 · Cited by 494
Kieffer, S. W. (1982) · Reviews of Geophysics · doi:10.1029/rg020i004p00827 · Cited by 332
Metadata
- Authors
- Boyd, F. R., & England, J. L.
- Venue
- Journal of Geophysical Research
- Publisher
- American Geophysical Union (AGU)
- Published
- 1960-02
- Volume
- 65
- Issue
- 2
- Pages
- 749-756
- ISSN
- 0148-0227 (ISSN-L)
- OpenAlex
- W2058326659
- Cited by
- 189
- References
- 0
- FWCI
- 15.47
- Type
- journal article
- Language
- en
- Open access
- closed
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- Boyd, F. R., & England, J. L. (1960). The quartz-coesite transition. Journal of Geophysical Research. https://doi.org/10.1029/jz065i002p00749
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