| Zr | Zirconium | Atomic number : 40 Relative atomic mass (12C = 12.0000) : 91.224 |
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| P H Y S I C A L D A T A | |
| Group 4 transition metal Density / kg m-3 : 6506 [293 K]; 5800 [liquid at m.p.] |
Melting point / K : 2125 Boiling point / K : 4650 |
| D I S C O V E R Y | |
| Zirconium was discovered in 1789 by M.H. Klaproth at University of Berlin, Germany. First isolated in 1824 by J.J. Berzelius at Stockholm, Sweden. |
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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) : 560 Earth's crust / p.p.m. : 190 Residence time / years : n.a. Oxidation state : IV |
Seawater / p.p.m. : 9.6 × 10-6 |
| B I O L O G I C A L D A T A | |
| Level in humans Blood / mg dm-3 : 0.011 Bone / p.p.m. : < 0.1 Liver / p.p.m. : 0.11 Muscle / p.p.m. : 0.08 |
Daily dietary intake : c. 0.05 mg Total mass of element in average (70 kg) person : 1 mg |
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A portrait of zirconium is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements. |