 |
| Name |
erbium |
| Symbol |
Er |
| Atomic Weight |
167.259 |
| Atomic Number |
68 |
| CAS ID |
7440-52-0 |
| Group Number |
(none) |
| Group Name |
Lanthanoid |
| Period Number |
6 |
| Origin of Name |
Named after Ytterby, Sweden. |
| Year Discovered |
1842 |
| Discovery Credits |
Discovered by C. G. Mosander at Stockholm, Sweden. |
| Class |
Metallic |
| Color |
Silvery white |
| Standard State |
Solid at 77 F & 298 K |
| Description |
Silver-gray metal of the rare earth group. slowly tarnishes
in air, slowly reacts with water, dissolves in acids. Used in infrared
absorbing glass, alloys with titanium. Diagnostic tests:
There are no simple diagnostic tests to identify erbium.
X-ray fluorescence spectroscopy is commonly employed to identify and
analyze members of the Rare-Earth group elements.
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