| Fe | Iron | Atomic number : 26 Relative atomic mass (12C = 12.0000) : 55.845 |
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| P H Y S I C A L D A T A | |
| Group 8 transition metal Density / kg m-3 : 7874 [293 K]; 7035 [liquid at m.p.] |
Melting point / K : 1808 Boiling point / K : 3023 |
| D I S C O V E R Y | |
| Known to ancient civilizations. |
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| G E O L O G I C A L D A T A | |
| Abundances Sun (relative to H = 1 × 1012) : 3.16 × 107 Earth's crust / p.p.m. : 41 000 Residence time / years : 98 Classification : recycled Oxidation state : III |
Seawater / p.p.m. : Atlantic surface : 1 × 10-4 Atlantic deep : 4 × 10-4 Pacific surface : 0.1 × 10-4 Pacific deep : 1 × 10-4 |
| B I O L O G I C A L D A T A | |
| Level in humans Blood / mg dm-3 : 447 Bone / p.p.m. : 3 - 380 Liver / p.p.m. : 250 -1400 Muscle / p.p.m. : 180 |
Daily dietary intake : 6 - 40 mg Total mass of element in average (70 kg) person : 4.2 g |
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A portrait of iron is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements. |