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Hafnium - Dictionary Definition and Overview |
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Hafnium : (noun)
1: a gray tetravalent metallic element that resembles zirconium
chemically and is found in zirconium minerals; used in
filaments for its ready emission of electrons [syn: Hf,
atomic number 72]
Based on WordNet 2.0
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Hafnium : Symbol: Hf
Atomic number: 72
Atomic weight: 178.49
Silvery lustrous metallic transition element. Used in tungsten alloys in
filaments and electrodes, also acts as a neutron absorber. First reported
by Urbain in 1911, existence was finally established in 1923 by D. Coster,
G.C. de Hevesy in 1923.
Based on WordNet (r) 2.0 (August 2003)
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