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Rust in the Apollo 16 rocksApollo 16 samples of all four rock types and from all stations contain evidence for hydration and oxidation - i.e., the presence of hydrated iron oxide, probably goethite. Rock 66095 contains native FeNi grains with a characteristic intergrowth of schreibersite and, to lesser extents, of cohenite. Troilite also contains sphalerite. The goethite contains 1.5-4.6 wt.% chlorine and occurs mainly on the edges of FeNi metal, causing a rust color in the cracks and space around the native metal grains, which also contain abundant chlorine. This observation suggests the presence of lawrencite (FeCl2), a phase that deliquesces and oxidizes very rapidly upon exposure to water or to a moist atmosphere.
Document ID
19740040111
Document Type
Conference Proceedings
Authors
Taylor, L. A. (Purdue University Lafayette, Ind.; Tennessee, University, Knoxville, Tenn., United States)
Mao, H. K.
Bell, P. M. (Carnegie Institution of Washington Washington, D.C., United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1973
Subject Category
SPACE SCIENCES
Meeting Information
Lunar Science Conference(Houston, TX)
Funding Number(s)
CONTRACT_GRANT: NGL-09-140-012
CONTRACT_GRANT: NGL-15-005-164
Distribution Limits
Public
Copyright
Other