Ytterbium
Revision as of 07:19, 24 July 2013 by (username removed)
Description
A rare earth metal of the yttrium group that occurs in the minerals gadolinite, euxenite, xenotime, and monazite. It is a silvery, ductile metal that exists in an alpha crystalline form at normal temperatures and a beta crystalline form and high temperatures (over 798 C). Metallic ytterbium is used in lasers, portable x-ray sources and phosphors that convert infrared radiation to visible light. Ytterbium oxide is used in special alloys, dielectric ceramics, and in special glasses.
Synonyms and Related Terms
Yb
Other Properties
Soluble in dilute acids and liquid ammonia. Reacts slowly with water.
| Composition | Yb (atomic no. 70) |
|---|---|
| CAS | 7440-64-4 |
| Melting Point | 819 |
| Density | 6.997 |
| Molecular Weight | atomic wt =173.04 |
| Boiling Point | 1196 |
Hazards and Safety
Sensitive to moisture and air. Contact may cause irritation. Powder is flammable.
Fisher Scientific: MSDS
Authority
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 177