Tantalum

Symbol

Ta

Atomic number

73

Atomic mass	180.947		Thermal conductivity	0.55
Atomic radius	2.09		Covalent radius	1.34
Density	16.6		Atomic volume	10.9
Melting point	3270		Oxidation states	5
Boiling point	5731		Stable isotopes	1
Heat of vapor.	743		Electronegativity	1.5
Heat of fusion	31.6		First ionization	7.89
Specific heat	0.14		Electrical conduct.	...

Electron configuration

Tantalum

Tantalum and Niobium commonly occur together in the iron -containing minerals columbite (FeNb₂O₆) and tantalite (FeTa₂O₆). Tantalum with niobium, manganese and iron form the oxides manganocolumbite and manganotantalite. Tantalum is found with calcium, solium and fluorine in the oxide mineral microlite. Tantalum is found with uranium, yttrium, cerium and titanium in the complex oxide mineral euxenite. Tantalum is found with niobium and aluminum in the oxide mineral simpsonite. Tantalum is found with niobium, manganese and iron in the oxide mineral tapiolite. An oxide of antimony and tantalum is stibiotantalite.

Tantalum carbide, TaC, is a very hard substance which is used for making high-speed cutting tools.

Tantalum Nuclear Data