65 Tb 158.925352

Terbium

LANTHANIDE

Phase: Solid

Discovered: Carl Gustaf Mosander

Block: F

Summary

Terbium is a chemical element with symbol Tb and atomic number 65. It is a silvery-white rare earth metal that is malleable, ductile and soft enough to be cut with a knife. Terbium is never found in nature as a free element, but it is contained in many minerals, including cerite, gadolinite, monazite, xenotime and euxenite.

Appearance: silvery white

Source: Wikipedia

Physical Properties

Atomic Mass 158.925352 u

Density 8.23 g/cm³

Melting Point 1629 K

Boiling Point 3396 K

Molar Heat 28.91 J/(mol·K)

Electron Affinity 112.4 kJ/mol

Ionization Energies

1^st: 565.8 kJ/mol

2^nd: 1110 kJ/mol

3^rd: 2114 kJ/mol

4^th: 3839 kJ/mol