Condensation and fractionation of rare earths in the solar nebula

Details Condensation and fractionation of rare earths in the solar nebula Condensation and fractionation of rare earths in the solar nebula

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979gecoa..43.1611d&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 43, Oct. 1979, p. 1611-1632. Research supported by the Alfred P. Sloan Research Foundatio

Astronomy and Astrophysics

Astronomy

34

Chemical Fractionation, Interstellar Chemistry, Planetary Nebulae, Rare Earth Elements, Astronomical Models, Chondrites, Inclusions, Perovskites, Thermodynamic Properties

Scientific paper

The condensation behavior of the rare earth elements in the solar nebula is calculated on the basis of the most recent thermodynamic data in order to construct a model explaining group II rare earth element patterns in Allende inclusions. Models considered all involve the removal of large fractions of the more refractory heavy rare earth elements in an early condensate, followed by the condensation of the remainder at a lower temperature. It is shown that the model of Boynton (1975) in which one rare earth element component is dissolved nonideally in perovskite according to relative activity coefficients can not reasonably be made to fit the observed group II patterns. A model in which two rare earth components control the patterns and dissolve ideally in perovskite is proposed and shown to be able to account for the 20 patterns by variations of the perovskite removal temperature and the relative proportions of the two components.

Affiliated with

Also associated with

No associations

Rating

Condensation and fractionation of rare earths in the solar nebula does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Condensation and fractionation of rare earths in the solar nebula, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Condensation and fractionation of rare earths in the solar nebula will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1387929