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Temperature-dependent magnetic properties of individual glass spherules, Apollo 11, 12, and 14 lunar samples.Magnetic susceptibility of 11 glass spherules from the Apollo 14 lunar fines have been measured from room temperature to 4 K. Data taken at room temperature, 77 K, and 4.2 K, show that the soft saturation magnetization was temperature independent. In the temperature range 300 to 77 K the temperature-dependent component of the magnetic susceptibility obeys the Curie law. Susceptibility measurements on these same specimens and in addition 14 similar spherules from the Apollo 11 and 12 mission show a Curie-Weiss relation at temperatures less than 77 K with a Weiss temperature of 3-7 degrees in contrast to 2-3 degrees found for tektites and synthetic glasses of tektite composition. A proposed model and a theoretical expression closely predict the variation of the susceptibility of the glass spherules with temperature.
Document ID
19730035042
Document Type
Conference Proceedings
Authors
Thorpe, A. N.
Sullivan, S. (Howard University Washington, D.C., United States)
Alexander, C. C.
Senftle, F. E.
Dwornik, E. J. (U.S. Geological Survey Washington, D.C., United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1972
Subject Category
SPACE SCIENCES
Meeting Information
Lunar Science Conference(Houston, TX)
Funding Number(s)
CONTRACT_GRANT: NGL-09-011-006
Distribution Limits
Public
Copyright
Other