Olivine-Spinel transformation in a natural forsterite

Details Olivine-Spinel transformation in a natural forsterite Olivine-Spinel transformation in a natural forsterite

Sep 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971pepi....4..425i&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 4, Issue 5, p. 425-428.

Physics

2

Scientific paper

The olivine-spinel transformation in a natural forsterite is studied in the pressure range 98-130 kb and the temperature range 700-1100 °C. The reaction boundary at which olivine solid solution of 93% Mg2SiO4 and 7% Fe2SiO4 breaks down to spinel solid solution and olivine solid solution is determined as P(kb) = 0.054T(°C)+61. The entropy change of the metastable olivine-spinel transformation in pure Mg2SiO4 is calculated to be - 4.4 cal/° . mole at 100 kb and 1000 °C.

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