Terbium

History
Carl Mozander opened terbium in 1843. He shared Yttrium land into three components - yttrium, terbium and erbium. In the early 20 th century the famous French chemist Georges Urben found, finally, the pure products of terbium. Salts of terbium were pink, as said Mozander.

Nowadays
Terbium metal is very rare in nature, so this metal is used for very rare cases. Terbium iron alloy known for its magnetostrictive effect, widely used in engineering. Different compounds with terbium are manufacturing thermoelectric materials, laser materials, luminophores, catalysts, and electronics.