hafnium

haf·ni·um  (hfn-m)

n. Symbol Hf

A brilliant, silvery, metallic element separated from ores of zirconium and used in nuclear reactor control rods, as a getter for oxygen and nitrogen, and in the manufacture of tungsten filaments. Atomic number 72; atomic weight 178.49; melting point 2,220°C; boiling point 5,400°C; specific gravity 13.3; valence 4. See Table at element.

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[After Hafnia, Medieval Latin name for Copenhagen, Denmark.]

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hafnium [ˈhæfnɪəm]

n

(Chemistry / Elements & Compounds) a bright metallic element found in zirconium ores: used in tungsten filaments and as a neutron absorber in nuclear reactors. Symbol: Hf; atomic no.: 72; atomic wt.: 178.49; valency: 4; relative density: 13.31; melting pt.: 2231±20°C; boiling pt.: 4603°C

[New Latin, named after Hafnia, Latin name of Copenhagen + -ium]

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hafnium  (hfn-m)

Symbol Hf

A bright, silvery metallic element that occurs in zirconium ores. Because hafnium absorbs neutrons better than any other metal and is resistant to corrosion, it is used to control nuclear reactions. Atomic number 72; atomic weight 178.49; melting point 2,220°C; boiling point 5,400°C; specific gravity 13.3; valence 4. See Periodic Table.

Thesaurus

Noun

1.

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 atomic number 72, Hf metal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.

Translations

hafnium [ˈhæfnɪəm] N → hafnio m

hafnium

n (Chem) → Hafnium nt