Terbium

Symbol

Tb

Atomic number

65

Atomic mass	158.925		Thermal conductivity	0.111
Atomic radius	2.51		Covalent radius	1.59
Density	8.2		Atomic volume	19.2
Melting point	1630		Oxidation states	3,4
Boiling point	3396		Stable isotopes	1
Heat of vapor.	330.9		Electronegativity	1.2
Heat of fusion	10.8		First ionization	5.86
Specific heat	0.18		Electrical conduct.	...

Electron configuration

Terbium

As a member of the fourteen member lanthanide series, this element has few properties which distinguish it from the other members of the series. All of them along with lanthanum, yttrium, and scandium occur in very small quantities in nature. The usual source is the mineral monazite, or monazite sand, which is a mixture of phosphates containing also some thorium phosphate.

Terbium Nuclear Data