Properties of iron at the Earth's core conditions.

Details Properties of iron at the Earth's core conditions. Properties of iron at the Earth's core conditions.

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986geoji..84..561a&link_type=abstract

Geophysical Journal International, Vol. 84, No. 3, p. 561 - 579

Physics

Earth Core:Iron

Scientific paper

The phase diagram of iron up to 330 GPa is solved using the experimental data of static high pressure (up to 11 GPa) and the experimental data of shock wave data (up to 250 GPa). A solution for the highest triple point is found (P = 280 GPa and T = 5760K) by imposing the thermodynamic constraints of triple points. This pressure of the triple point is less than the pressure of the inner core - outer core boundary of the Earth. These results indicate that the density of iron at the inner core - outer core boundary pressure is close to 13 g cm-3, which lies close to the seismic solutions of the Earth at that pressure. It is thus concluded that the Earth's inner core is very likely to be virtually pure iron in its hexagonal close packed phase.

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