 |
| Name |
praseodymium |
| Symbol |
Pr |
| Atomic Weight |
140.90765 |
| Atomic Number |
59 |
| CAS ID |
7440-10-0 |
| Group Number |
|
| Group Name |
Lanthanoid |
| Period Number |
6 |
| Origin of Name |
Greek, prasios didymos = "green twin" |
| Year Discovered |
1885 |
| Discovery Credits |
Separated by Baron Auer von Welsbach at Vienna, Austria. |
| Class |
Metallic |
| Color |
Silvery White, Yellowish Tinge |
| Standard State |
Solid at 77 F & 298 K |
| Description |
Soft, malleable, silvery metal of the lanthanide group.
Reacts slowly with oxygen, rapidly with water. Used in alloys for
permanent magnets, flints, yellow glass for eye protection for welders,
etc. Diagnostic tests:
There are no simple diagnostic tests to identify praeseodymium.
X-ray fluorescence spectroscopy is commonly employed to identify and
analyze members of the Rare-Earth group elements.
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