Physics
Scientific paper
Jan 1960
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1960gecoa..18..101b&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 18, Issue 1-2, pp.101-107
Physics
4
Scientific paper
Analyses of five chondrites by simultaneous neutron activation yielded average concentrations of (9·4 ± 0·3) × 10 -6 g Sc / g meteorite, (2.2 ± 0.1) × 10 -3 g Cr / g meteorite and meteorite. Following the assumptions of , these results lead to cosmic abundances of 32,6400 and 0.078 (per 10 6 Si atoms) for Sc, Cr and Eu, respectively. Except for lowering the europium abundance by a factor of 2, the abundances based on chondrite analyses are not materially altered. The present results are consistently lower than the solar abundances reported by Aller, approaching nearly an order of magnitude in the case of europium. The concentrations of the three elements in two achondrites varied markedly; the Sc/Eu atom ratio, for example, decreased from an average of 410 for the chondrites to 190 for Nuevo Laredo but increased to 5700 for Johnstown, Colorado.
Bate George L.
Huizenga J. R.
Potratz H. A.
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