A portrait of thulium is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements.
| Tm | Thulium |
Atomic number : 69
Relative atomic mass (12C = 12.0000) : 168.93421 |
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| P H Y S I C A L D A T A | |
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Group 3 lanthanide Density / kg m-3 : 9321 [293 K] |
Melting point / K : 1818 Boiling point / K : 2220 |
| D I S C O V E R Y | |
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Discovered in 1879 by P.T. Cleve at Uppsala, Sweden. |
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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) : 1.8 Earth's crust / p.p.m. : 0.48 Residence time / years : n.a. Classification : recycled Oxidation state : III |
Seawater / p.p.m. : Atlantic surface : 1.3 × 10-7 Atlantic deep : 1.6 × 10-7 Pacific surface : 0.7 × 10-7 Pacific deep : 3.3 × 10-7 |
| B I O L O G I C A L D A T A | |
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Level in humans Organs: n.a., but low |
Daily dietary intake : n.a. Total mass of element in average (70 kg) person : n.a. |
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A portrait of thulium is available on the Visual Elements site. Up to 200 individual items of information on this element are available in The Elements. |