Partitioning of rare earth elements between hibonite and melt and implications for nebular condensation of the rare earth elements

Details Partitioning of rare earth elements between hibonite and melt and implications for nebular condensation of the rare earth elements Partitioning of rare earth elements between hibonite and melt and implications for nebular condensation of the rare earth elements

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988metic..23...75d&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 23, March 1988, p. 75-80.

Computer Science

3

Carbonaceous Chondrites, Melts (Crystal Growth), Meteoritic Composition, Rare Earth Elements, Electron Probes, Gas Mixtures, Partitioning, Rare Earth Elements, Hibonite, Melting, Solar Nebula, Condensation, Silicate, Laboratory Studies, Concentration, Abundance, Anomalies, Oxygen, Fugacity, Melts, Temperature

Scientific paper

The effect of oxygen fugacity on the partitioning of REEs between hibonite and silicate melt is investigated in hibonite-growth experiments at 1470 C. The experimental procedures and apparatus are described, and the results are presented in extensive tables and graphs and characterized in detail. The absolute activity coefficients in hibonite are estimated as 330 for La, 1200 for Eu(3+), and 24,000 for Yb. It is inferred that ideal solution behavior cannot be assumed when calculating REE condensation temperatures for (Ca, Al)-rich inclusions in carbonaceous chondrites.

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