 |
| Date of Discovery: |
1923 |
| Discoverer: |
Dirk Coster |
| Name Origin: |
From the Latin word Hafnia (Copenhagen) |
| Uses: |
nuclear reactors |
| Obtained From: |
zircon |
| Atomic Number: |
72 |
| Atomic Mass: |
178.49 amu |
| Melting Point: |
2150.0 °C (2423.15 °K, 3902.0 °F) |
| Boiling Point: |
5400.0 °C (5673.15 °K, 9752.0 °F) |
| Crystal Structure: |
Hexagonal |
| Density @ 293 K: |
13.2 g/cm3 |
| Color: |
Silver |
| Isotope |
Hf-172 |
Hf-174 |
Hf-175 |
Hf-176 |
Hf-177 |
Hf-179 |
Hf-180 |
Hf-182 |
| Half Life |
1.9 years |
2.0E15 years |
70.0 days |
Stable |
Stable |
Stable |
Stable |
Stable |
|
