Niobium

Catalogue

Atomic structure

Discovery

Source

Element USES

physical property

Chemical property

Geological data

Biology data

Atomic structure

Atomic radius/A: 2.08 atomic volume/cm3 / mol: 10.87 covalent radius/A: 1.34

Electronic configuration: 1 2 3 4 s2p6 s2 s2p6d10 s2p6d4 5 s1 ion radius/A: 0.69 oxidation state: 5, 3

Discovery

In 1801, the c. Hatchett (Britain, London) found.

Source

Exist in mineral Ke iron ore (columbite).

Element USES

Made of stainless steel alloy with its, can be used for and the reactor, the rockets, cutting tools, pipe, the magnets, etc.

physical property

State: soft white luster transition metal. Melting point (℃) : 2468 boiling point (℃) : 4744 density (g/cc, 300 K) : 8.57

Than hot/J/gK: 0.26 evaporation heat/KJ/mol: 682 melting hot/KJ/mol: 26.4

Conductive rate / 106 / cm: 0.0693 coefficient of thermal conductivity/W/cmK: 0.537

Geological data

Abundance retention time/year:

The sun (relative to the H = 1 x 1012) : 79 sea/P.P.M. : 9 x 10-seven

The earth's crust/P.P.M. : 20 the Atlantic ocean surface: Pacific surface:

Atmospheric/P.P.M. (volume) : the Atlantic ocean depths: deep in the Pacific:

Biology data

The human body the content in liver/P.P.M. : 0.14

Organs: muscle/P.P.M. : 0.14

Blood/mg dm-3:0.005 days intake/mg: 0.02-0.6

Bone/P.P.M. : < 0.07 (70 Kg) are total body/mg: 1.5

Detailed information

Niobium/Nb