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Hydrostatic compression of Fe(1-x)O wuestiteHydrostatic compression measurements on Fe(0.95)O wuestite up to 12 GPa yield a room temperature value for the isothermal bulk modulus of K(ot) = 157 (+ or - 10) GPa at zero pressure. This result is in accord with previous hydrostatic and nonhydrostatic measurements of K(ot) for wuestites of composition: 0.89 = Fe/O 0.95. Dynamic measurements of the bulk modulus by ultrasonic, shock-wave and neutron-scattering experiments tend to yield a larger value: K(ot) approximately 180 GPa. The discrepancy between static and dynamic values cannot be explained by the variation of K(ot) with composition, as has been proposed. This conclusion is based on high-precision compression data and on theoretical models of the effects of defects on elastic constants. Barring serious errors in the published measurements, the available data suggest that wuestite exhibits a volume relaxation under pressure.
Document ID
19860051350
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Jeanloz, R.
(California, University Berkeley, United States)
Sato-Sorensen, Y.
(Washington, University Seattle, United States)
Date Acquired
August 12, 2013
Publication Date
April 10, 1986
Publication Information
Publication: Journal of Geophysical Research
Volume: 91
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
86A36088
Distribution Limits
Public
Copyright
Other

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