ABUNDANCES OF RARE EARTHS IN SUN

We have determined the solar abundances of the rare earths (La, Ce, Pr, Nd, Sm, Eu, Gd, Dy, Er, Tm, Yb, Lu) on the basis of measurements made on new high-resolution tracings of the solar spectrum obtained at the International Scientific Station of the Jungfraujoch (Switzerland) by L. Delbouille, L. Neven and G. Roland. Our results (Table XV) are compared with those of other authors for the sun and meteorites as well as with the abundances predicted by nucleosynthesis theories. © 1969 D. Reidel Publishing Company.