hafnium (redirected from Celtium)

hafnium /haf·ni·um/ (Hf) (haf´ne-um) chemical element, at. no. 72.

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haf·ni·um (hfn-m)

n. Symbol Hf

A metallic element found with zirconium and used in nuclear reactor control rods and in tungsten alloys used in filaments. Atomic number 72.

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hafnium

a chemical element, atomic number 72, atomic weight 178.49, symbol Hf. See Table 6.