 |
| Date of Discovery: |
1885 |
| Discoverer: |
C.F. Aver von Welsbach |
| Name Origin: |
From the Greek words prasios (green) and didymos (twin) |
| Uses: |
Coloring glass and ceramics |
| Obtained From: |
Salts |
| Atomic Number: |
59 |
| Atomic Mass: |
140.90765 amu |
| Melting Point: |
935.0 °C (1208.15 °K, 1715.0 °F) |
| Boiling Point: |
3127.0 °C (3400.15 °K, 5660.6 °F) |
| Crystal Structure: |
Hexagonal |
| Density @ 293 K: |
6.77 g/cm3 |
| Color: |
Unknown |
Isotope |
Pr-141 |
Pr-142 |
Pr-143 |
Pr-144 |
Pr-145 |
Half Life |
Stable |
19.12 hours |
13.57 days |
17.28 min
|
7.2 min |
|
