The quartz-coesite transition measured in the presence of a silicate liquid and calibration of piston-cylinder apparatus
- Creators
- Boettcher, A. L.
- Wyllie, P. J.
Abstract
Hydrothermal melting reactions in the system NaAlSiO_4-SiO_2-H_2O have been extended into the coesite stability field using piston-cylinder apparatus, and the quartz-coesite transition has been bracketed at 735° (28.0±0.9 Kb) and at 800° C (28.15±0.9 Kb) in the presence of a silicate liquid phase; this provided favorable kinetic conditions. The results agree closely with previous piston-cylinder determinations employing a correction for pressure loss due to friction. Consideration of previous calibration and hysteresis experiments leads to the conclusion that despite its potential utility, the quartz-coesite transition can not be confidently used as a calibrant for piston-cylinder apparatus until the question of whether or not to apply a friction correction has been resolved.
Additional Information
© 1968 Springer International Publishing AG. This work was supported by NSF Grant GP-4910, using apparatus supplied by ARPA Contract SD-89.Additional details
- Eprint ID
- 64086
- Resolver ID
- CaltechAUTHORS:20160129-091937540
- NSF
- GP-4910
- Advanced Research Projects Agency (ARPA)
- SD-89
- Created
-
2016-01-29Created from EPrint's datestamp field
- Updated
-
2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Division of Geological and Planetary Sciences (GPS)