Dissolution of K in molten iron at high pressure and temperature

Details Dissolution of K in molten iron at high pressure and temperature Dissolution of K in molten iron at high pressure and temperature

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993georl..20.1651i&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 20, no. 15, p. 1651-1654.

Physics

18

Earth Core, Iron, Melting, Phase Separation (Materials), Potassium, Silicates, Chemical Composition, Geochemistry, Pressure Effects, Temperature Effects

Scientific paper

Partitioning of K between molten iron and silicate melt was examined at about 26 GPa and 2600 C using a mixture of pure iron and natural microcline as the starting material. The dissolution of K in molten iron up to about 0.2 wt pct was confirmed. The distribution coefficient of K between molten iron and silicate melt was about 0.038 (atomic ratio). This value suggests the presence of 5 ppm K in the earth's core, yielding 3 x 10 exp 10 W for the present day heat generation by K.

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