Periodic Table of the Elements: Hafnium


Name: Hafnium
Symbol: Hf
Atomic Number: 72
Atomic Mass: 178.49
Atomic Volume: 13.47 cc/mol
Discovered By: D. Coster and G. von Hevesy
Discovery Date: 1923
Origin of Name: Hafnium - Hafnia, Latin name for Copenhagen
Toxicity: ???
Summary: Not found free in Nature. Finely divided hafnium will ignite spontaneously in air (pyrophoric). Hafnium is very similar chemically to zirconium and is separated from it only with difficulty.

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HHe
LiBeBCNOFNe
NaMgAlSiPSClAr
KCaScTiVCrMnFeCoNiCuZnGaGeAsSeBrKr
RbSrYZrNbMoTcRuRhPdAgCdInSnSbTeIXe
CsBaLaCePrNdPmSmEuGdTbDyHoErTmYbLuHfTaWReOsIrPtAuHgTlPbBiPoAtRn
FrRaAcThPaUNpPuAmCmBkCfEsFmMdNoLr

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