hafnium

Definitions

  • WordNet 3.6
    • n hafnium a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
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Webster's Revised Unabridged Dictionary
    • n hafnium hăf"nē*ŭm or häf"nē*ŭm A metallic element of atomic number 72 present together with zirconium to the extent of 1% to 5% in zirconium minerals. It is a poisonous, ductile metal with a brilliant silver luster, has an atomic weight of 178.49, and has a high melting point (2227° C). It is used in nuclear reactors, and incandescent lamps as a scavenger of oxygen and nitrogen. See also norium.
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Usage


In science:

In 1935 Aston discovered 57Fe at Cavendish and described the results in his article The Isotopic Constitution and Atomic Weights of Hafnium, Thorium, Rhodium, Titanium, Zirconium, Calcium, Gallium, Silver, Carbon, Nickel, Cadmium, Iron and Indium .
Discovery of the Iron Isotopes
Aston described the discovery of 106Cd in the 1935 article The Isotopic Constitution and Atomic Weights of Hafnium, Thorium, Rhodium, Titanium, Zirconium, Calcium, Gallium, Silver, Carbon, Nickel, Cadmium, Iron and Indium .
Discovery of the Cadmium Isotopes
Aston described the discovery of 108Cd in the 1935 article The Isotopic Constitution and Atomic Weights of Hafnium, Thorium, Rhodium, Titanium, Zirconium, Calcium, Gallium, Silver, Carbon, Nickel, Cadmium, Iron and Indium .
Discovery of the Cadmium Isotopes
Panzer, M.A. et al. Thermal Properties of Ultrathin Hafnium Oxide Gate Dielectric Films. Electron Device Letters, IEEE 30, 1269-1271 (2009). 246.
Nanoscale Heat Transfer: from Computation to Experiment
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