Terbium (Tb)

Terbium (Tb)

Atomic Number: 65
Atomic Weight: 158.93
Melting Point: 1356
Boiling Point: 3123
Specific Gravity: 8.229
Valence(s): 3 or 4

Terbium was discovered by Mosander in 1843. It is obtained from the mineral monazite. Its compounds have been used in laser lights and solid-state devices. It may potentially be used as a green phosphor for colour television tubes. Terbium is named after Ytterby, the Swedish village. [LM] {RW}