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Name Terbium
Symbol Tb
Atomic number 65
Atomic mass 158.92535 amu
Normal state Solid
Classification Metallic
Crystal structure Hexagonal
Color silvery white
Date of discovery 1843
Name of discoverer Carl Gustaf Mosander
Name origin Named for Ytterby, Sweden
Uses Used in alloys, fuel cell stablizer and in lasers.
Obtained from Found chiefly in monazite ore.