EFFECTS OF IMPURITIES ON THE CRYSTALLOGRAPHIC MODIFICATIONS OF CALCIUM METAL

Journal Article · Fri May 01 00:00:00 EDT 1959 · Journal of the Electrochemical Society (U.S.) Absorbed Electrochem. Technol.

DOI:https://doi.org/10.1149/1.2427377· OSTI ID:4259059

Smith, J F; Bernstein, B T

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.)

• Research Organization: Iowa State Coll., Ames
• Sponsoring Organization: USDOE
• NSA Number: NSA-13-013619
• OSTI ID: 4259059
• Journal Information: Journal of the Electrochemical Society (U.S.) Absorbed Electrochem. Technol., Vol. Vol: 106; Other Information: Orig. Receipt Date: 31-DEC-59
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

METALLURGY AND CERAMICS
BORON
CALCIUM
CARBON
CRYSTALLIZATION
DIFFRACTION
ETHANE
GEIGER- MUELLER COUNTERS
HYDROGEN
IMPURITIES
LATTICES
NITROGEN
OXYGEN
SPECTROMETERS
VARIATIONS
X RADIATION