Chemical composition of Luna 20 soil and rock fragments

Details Chemical composition of Luna 20 soil and rock fragments Chemical composition of Luna 20 soil and rock fragments

Apr 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973gecoa..37..909j&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 37, Issue 4, pp.909-914

Computer Science

2

Scientific paper

Abundances of 22 elements, including 9 rare earth elements (REE), have been determined by `monostandard' instrumental neutron activation analysis of samples from the Luna 20 soil and in 6 rock fragments, including a crystalline rock of highland origin, a breccia of similar composition, a glass and a feldspar grain. The soil appears to have been contaminated with W and Mo. The REE content of the soil is very low, being close to 2.3 times below the level in the Luna 16 soil. Sampling errors, for most elements, are negligible in the case of analyses performed on one or several tens of mg of soil, but they become significant on crystalline rock fragments in the 1-2 mg range.

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