Lanthanum

Symbol LaAtomic number 57
Atomic mass
138.905
 Thermal conductivity
0.135
Atomic radius
2.74
 Covalent radius
1.69
Density
6.15
 Atomic volume
20.73
Melting point
1193
 Oxidation states
3
Boiling point
3730
 Stable isotopes
2
Heat of vapor.
414.0
 Electronegativity
1.10
Heat of fusion
6.2
 First ionization
5.58
Specific heat
0.19
 Electrical conduct.
...
Electron configuration

General descriptionNuclear data
 Index

Periodic Table

Chemistry concepts
 
HyperPhysicsR Nave
 Go Back





Lanthanum

Lanthanum forms colorless compounds similar to those of aluminum. It has yet to find much importance in use. It is usually found in nature with scandium and yttrium and the fourteen members of the lanthanide series.

The mineral monazite is a source of lanthanum. Lanthanum is found in the fluorides Parisite and bastnaesite. It is found in the silicate mineral allanite.

Atomic dataNuclear data
 Index

Periodic Table

Chemistry concepts

Reference
Pauling
 
HyperPhysicsR Nave
 Go Back







Lanthanum Nuclear Data

Z
A
Atomic
Mass (u)
Nuclear
Mass(GeV/c2)
Binding
Energy(MeV)
Spin
Natural
Abund.
Half-life
Decay
Q
MeV
57
137
136.906463
127.4995
1148.3
7/2
...
60ky
EC
0.61
57
138
137.907106
128.4316
1155.8
5
0.0009
1.06x1011y
b+,b-
1.04,0.72
57
139
138.906347
129.3624
1164.6
7/2
0.9991
stable
...
...
Atomic data
Index

Periodic Table

Chemistry concepts

Reference
Rohlf
 
HyperPhysicsR Nave
 Go Back