A portrait of hafnium is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements.
| Hf | Hafnium |
Atomic number : 72
Relative atomic mass (12C = 12.0000) : 178.49 |
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| P H Y S I C A L D A T A | |
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Group 4 transition metal Density / kg m-3 : 13 310 [293 K]; 12 000 [liquid at m.p.] |
Melting point / K : 2503 Boiling point / K : 5470 |
| D I S C O V E R Y | |
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Discovered in 1923 by D.Coster and G.C. von Hevesey at Copenhagen, Denmark. |
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| G E O L O G I C A L D A T A | |
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Abundances Sun (relative to H = 1 × 1012) : 6 Earth's crust / p.p.m. : 5.3 Residence time / years : n.a. Classification : n.a. Oxidation state : IV |
Seawater / p.p.m. : 7 × 10-6 |
| B I O L O G I C A L D A T A | |
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Level in humans Organs: n.a. |
Daily dietary intake : n.a. Total mass of element in average (70 kg) person : n.a. |
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A portrait of hafnium is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements. |