 |
| Date of Discovery: |
1879 |
| Discoverer: |
Theodor Cleve |
| Name Origin: |
From Thule (ancient name of Scandinavia) |
| Uses: |
Power for portable x-ray machines |
| Obtained From: |
Gadolinite, euxenite, xenotime |
| Atomic Number: |
69 |
| Atomic Mass: |
168.9342 amu |
| Melting Point: |
1545.0 °C (1818.15 °K, 2813.0 °F) |
| Boiling Point: |
1727.0 °C (2000.15 °K, 3140.6 °F) |
| Crystal Structure: |
Hexagonal |
| Density @ 293 K: |
9.321 g/cm3 |
| Color: |
Silverish |
Isotope |
Tm-168 |
Tm-169 |
Tm-170 |
Tm-171 |
Tm-172 |
Half Life |
93.1 days |
Stable |
128.6 days |
1.92 years |
2.65 days |
|
