Tantalum

Catalogue

Atomic structure

Discovery

Source

Element USES

physical property

Chemical property

Geological data

Biology data

Atomic structure

Atomic radius/A: 2.09
Atomic volume/cm3 / mol: 10.9
Electronic configuration: 1 2 3 4 s2p6 s2 s2p6d10 s2p6d10f14 5 s2p6d3 6 s2
Ion radius/A: 0.64
Covalent radius/A: 1.34 oxidation state: 5

Discovery

1802 by A.G. Ekeberg (Sweden, uppsala) found.

Source

Mainly exists in tantalite, with niobium symbiosis.

Element USES

Used in metal alloy. Five tantalum capacitors for oxidation. Tantalum also used for cutting tools, vacuum filament, the camera lens.

physical property

State: gray rare metal, has the very high melting point.

Melting point (℃) : 2996
Boiling point (℃) : 5425
Density (g/cc, 300 K) : 16.65

Than hot/J/gK: 0.14
Evaporation heat/KJ/mol: 743
Melting hot/KJ/mol: 31.6

Conductive rate / 106 / cm: 0.0761

Geological data

abundance
Retention time/year: unknown

The sun (relative to the H = 1 x 1012) : unknown sea/P.P.M. : 2 x 10-6
The earth's crust/P.P.M. : 2 the Atlantic ocean surface: Pacific surface:
Atmospheric/P.P.M. (volume) : the Atlantic ocean depths: deep in the Pacific:

Biology data

Content in the human body
Liver/P.P.M. : unknown
Organs: muscle/P.P.M. : unknown, but very low.
Blood/mg dm-3: unknown, but very low. Th intake/mg: 0.001
Bone/P.P.M. : c 0.03 (70 Kg) are total body/mg: c 0.2Tantalum

Detailed information

Tantalum/Ta