Other
Scientific paper
May 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975hnl..rept.....h&link_type=abstract
Final Report, period ending 31 May 1975 Holifield National Lab., Oak Ridge, TN.
Other
Lunar Soil, Surface Reactions, Water Vapor, Adsorption, Apollo 11 Flight, Apollo 17 Flight, Cosmic Rays, Heavy Nuclei, Leaching, Porosity
Scientific paper
The surface properties of lunar fines were investigated. Results indicate that, for the most part, these properties are independent of the chemical composition and location of the samples on the lunar surface. The leaching of channels and pores by adsorbed water vapor is a distinguishing feature of their surface chemistry. The elements of air, if adsorbed in conjunction with water vapor or liquid water, severely impedes the leaching process. In the absence of air, liquid water is more effective than water vapor in attacking the grains. The characteristics of Apollo 17 orange fines were evaluated and compared with those of other samples. The interconnecting channels produced by water vapor adsorption were found to be wider than usual for other types of fines. Damage tracks caused by heavy cosmic ray nuclei and an unusually high halogen content might provide for stronger etching conditions upon exposure to water vapor.
Gammage R. B.
Holmes H. F.
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