Category

Lanthanum

Catalogue

Atomic structure
Discovery
Source
Element USES
physical property
Chemical property
Geological data
Biology data

Atomic structure

Atomic radius/A: 2.74
Atomic volume/cm3 / mol: 20.73
Electronic configuration: 1 2 3 4 s2p6 s2 s2p6d10 s2p6d10 5 s2p6d1 6 s2
Ion radius/A: 1.061
Covalent radius/A: 1.69 oxidation state: 3

Discovery

1839 by C.G. Mosander (Stockholm, Sweden) found.

Source

Exist in monazite and ore bastnasite.

Element USES

Increase the refractive index of a glass, used for expensive camera lens. Also used to play firearms, battery electrodes and catalytic converter.

physical property

State: soft silvery transition metal.

Melting point (℃) : 920
Boiling point (℃) : 3457
Density (g/cc, 300 K) : 6.15

Than hot/J/gK: 0.19
Evaporation heat/KJ/mol: 414
Melting hot/KJ/mol: 6.2


Conductive rate / 106 / cm: 0.0126
Coefficient of thermal conductivity/W/cmK: 0.135

Geological data

abundance
Retention time/year: 200

The sun (relative to the H = 1 x 1012) : 13.5 sea/P.P.M. :
The earth's crust/P.P.M. : and the Atlantic ocean surface: 1.8 x 10-6 Pacific surface: 2.6 x 10-6
Atmospheric/P.P.M. (volume) : the Atlantic ocean depths: 3.8 x 10-6 deep in the Pacific: 6.9 x 10-6

Biology data

Content in the human body
Liver/P.P.M. : 0.3
Organs: muscle/P.P.M. : 0.0004
Blood/mg dm-3: unknown th intake/mg: unknown, but very little.
Bone/P.P.M. : < 0.08 (70 Kg) are total body/mg: c 0.8

Detailed information

Lanthanum/La