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- Name : Terbium
- Symbol : Tb
- Atomic # : 65
- Atom weight: 158.925
- Melting P. : 1356
- Boiling P. : 3230
- Oxidation : +3
- Pronounced : TUR-bi-em
- From :
- Identified : Gustaf Mosadner in 1843
- Appearance : Soft, ductile, silvery-gray, rare-earth metal
- Note : Used in modest amounts in special lasers and solid-state
- devices
-
- [Properties]
-
- Terbium is a soft, silvery metal. It feels something like lead, but looks
- a bit more like aluminum. It is a lot heavier than either of those familiar
- elements, though. Terbium is a member of the lanthanide series, from
- lanthanum (element 57) through lutetium (element 71).
- The element has two, temperature-dependent crystal forms, or allotropes.
- The alpha form is the one that exists at room temperature - up to 1298
- degrees. The beta form from prevails above that temperature.
-