Actions for Interaction of gases with lunar materials

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Interaction of gases with lunar materials

Author
Holmes, H. F.
Published
Jan 31, 1974.
Physical Description
1 electronic document
Additional Creators
Gammage, R. B. and Fuller, E. L., Jr.
Online Version

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Unclassified, Unlimited, Publicly available.
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Summary
The surface chemistry of Apollo 17 lunar fines samples 74220 (the orange soil) and 74241 (the gray control soil) has been studied by measuring the adsorption of nitrogen, argon, and oxygen (all at 77 K) and also water vapor (at 20 or 22 C). In agreement with results for samples from other missions, both samples had low initial specific surface areas, consisted of nonporous particles, and were attacked by water vapor at high relative pressure to give an increased specific surface area and create a pore system which gave rise to a capillary condensation hysteresis loop in the adsorption isotherms. In contrast to previous samples, both of the Apollo 17 soils were partially hydrophobic in their initial interaction with water vapor (both samples were completely hydrophilic after the reaction with water). The results are consistent with formation at high temperatures without subsequent exposure to significant amounts of water.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19740018177.
Accession ID: 74N26290.
NASA-CR-134290.
Terms of Use and Reproduction
No Copyright.
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