Bulk moduli of wüstite and periclase: a comparative study

Details Bulk moduli of wüstite and periclase: a comparative study Bulk moduli of wüstite and periclase: a comparative study

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pepi...45..273l&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 45, Issue 3, p. 273-279.

Physics

3

Scientific paper

An X-ray diffraction study of a mixture wüstite-periclase was carried out at room temperature and under hydrostatic pressures up to 83 kbar using a diamond-anvil press. The intervals (Δ x) between diffraction lines of wüstite and periclase having the same Miller index appear to decrease linearly with increasing pressure. Based on a theoretical analysis, the bulk modulus (B) of wüstite (Fe0.93O) should be at least 2% less than that of periclase. A detailed calculation yielded B0 = 1.50 +/- 0.03 Mbar and B'0 = 3.8 for Fe0.93O, assuming B0 = 1.600 Mbar and B'0 4.2 for periclase. Unlike all the values of bulk modulus for wüstile derived from X-ray diffraction studies in the literature, the present data are, more or less, independent of an equation of state.

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