Thulium (Tm)
- Atomic Number: 69
- Atomic Weight: 168.93
- Melting Point: 1545
- Boiling Point: 1947
- Specific Gravity: 9.321
- Valence(s): 2 or 3
Cleve discovered Thulium in 1879.
It is the most rare of the Lanthanides.
The most reliable source of Thulium is monazite.
Due to the high price of Thulium, it has few practical uses.
There is potential use for Thulium in the nuclear industry as a radiation source.
It is named for "Thule", the earliest name for Scandinavia.
[LM]
{RW}
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