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more about hafnium
hafnium |
2 definitions found From WordNet r 1.6 [wn]: hafnium n : 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}] From Elements database 20001107 [elements]: 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.
more about hafnium
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