Compositional and X-ray data for Luna 20 feldspar

Details Compositional and X-ray data for Luna 20 feldspar Compositional and X-ray data for Luna 20 feldspar

Apr 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973gecoa..37.1075s&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 37, Issue 4, pp.1075-1077

Computer Science

Scientific paper

Electron-microprobe analyses of 46 feldspar grains from the 125-500 m Luna 20 soil separate range only from 94.5 to 97.5 An (mol. %). One grain differs significantly--An 87 . Minor element contents are low: K < 0.15 wt .%; Mg < 0.14 wt .%; Fe < 0.15 wt .%. Singlecrystal X-ray data for two analyzed grains show sharp b and c diffractions characteristic of primitive anorthite. The 46 grains are similar in composition to those in feldspar-rich fragments found in all the Apollo missions.

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