Sulfur in the Earth's inner core

Details Sulfur in the Earth's inner core Sulfur in the Earth's inner core

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001e%26psl.193..509l&link_type=abstract

Earth and Planetary Science Letters, Volume 193, Issue 3-4, p. 509-514.

Physics

26

Scientific paper

Experiments have been conducted to study the Fe-S binary phase diagram near the pure iron end member, at pressures between 7 and 25 GPa and temperatures between 1223 and 1473 K. We observed that more than 1 atomic percent (at.%) sulfur dissolved in solid iron at 25 GPa and near the eutectic temperature. Incorporation of sulfur has non-negligible effects on the lattice parameters of solid iron. At 24.2 GPa, the unit-cell volume of a quenched solid iron is 1.2% larger, and its c/a ratio 0.5% larger than pure iron. These results support the prediction that the Earth's inner core contains a significant amount of sulfur.

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