Effect of hydrostatic pressure on the lattice parameters of Fe2SiO4 olivine up to 70 kbar

Details Effect of hydrostatic pressure on the lattice parameters of Fe2SiO4 olivine up to 70 kbar Effect of hydrostatic pressure on the lattice parameters of Fe2SiO4 olivine up to 70 kbar

Aug 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975pepi...10..348y&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 10, Issue 4, p. 348-354.

Physics

13

Scientific paper

The pressure dependence of the three lattice parameters and unit cell volume of fayalite (Fe2SiO4 olivine) was determined by X-ray diffraction under hydrostatic pressures up to 70 kbar. In order to eliminate stress inhomogeneity within a composite material consisting of a specimen mixed with an internal-pressure standard, a liquid (1 : 1 mixture of ethanol and methanol) was used as a pressure-transmitting medium. The isothermal bulk modulus calculated on the basis of the second-order Birch-Murnaghan equation of state gives the values K0 = 1.19 +/- 0.10 Mbar and K0' = 7 +/- 4, and if we assume K0' = 5: K0 = 1.24 +/- 0.02 Mbar. Three axes of fayalite were found to be compressible in the following order, b > c > a. Comparisons with the results obtained under non-hydrostatic compression are made. Address: Meteorological College, Kashiwa, Chiba-ken, 227, Japan.

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