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Author Smith, J. F. ♦ Bernstein, B. T.
Sponsorship USDOE
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword METALLURGY AND CERAMICS ♦ BORON ♦ CALCIUM ♦ CARBON ♦ CRYSTALLIZATION ♦ DIFFRACTION ♦ ETHANE ♦ GEIGER- MUELLER COUNTERS ♦ HYDROGEN ♦ IMPURITIES ♦ LATTICES ♦ NITROGEN ♦ OXYGEN ♦ SPECTROMETERS ♦ VARIATIONS ♦ X RADIATION
Abstract Samples of calcium were contaminated with oxygen, ethane, carbon, nitrogen, boron, and hydrogen to determine which impurities caused the appearance of the h.c.p. modification and which caused the low symmetry structure. Diffraction patterns were taken before and after contamination with a modified Geiger-counter diffractometer. A summary of thc diffraction results, which include transition temperatures, is tabulated. The results indicate that nitrogen or carbon will induce the appearance of the low symmetry phase in calcium, and hydrogen will induce the appearance of the h.c.p. phase. (J.H.M.)
ISSN 00134651
Educational Use Research
Learning Resource Type Article
Publisher Date 1959-05-01
Publisher Department Iowa State Coll., Ames
Journal Journal of the Electrochemical Society
Volume Number 106
Organization Iowa State Coll., Ames


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