Solubility of RU and Pd in Silicate Melts: The Effect of Melt Composition

Details Solubility of RU and Pd in Silicate Melts: The Effect of Melt Composition Solubility of RU and Pd in Silicate Melts: The Effect of Melt Composition

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27..197c&link_type=abstract

Lunar and Planetary Science, volume 27, page 197

Computer Science

1

Experimental Geochemistry, Platinum-Group Elements, Siderophile Elements

Scientific paper

Solubilities of Ru and Pd in silicate melts having compositions in the Na2O-MgO-CaO-Al2O3-TiO2-SiO2 +/- FeO system were measured. Large changes in Ru solubility were correlated with the melt's ratio of non-bridging oxygens to tetrahedral cations, nbo/t. Ru wt% = (190)exp[-22000/T + 3.7 + 1.7(nbo/t)]. Palladium solubility showed negligible variation over the same compositional range. Thus, fractionation of Ru from Pd during magmatic differentiation could occur based simply on the difference in solubility as a function of melt basicity. We also found that substitution of FeO for MgO increases the solubility of Pd and Ru, but only slightly.

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