On this page I'll provide comprehensive data for Lanthanum. I hope you profit from it.
Lanthanum Overview
Name Origin
Greek: lanthanein (to be hidden).
Symbol
La (Lanthanum)Description
Soft, silvery-white, malleable, ductile metal.
Discovery
Discovered By: Carl Mosander
Year: 1839
Location: Sweden
Sources
Found with rare earths in monazite and bastnasite. Monazite sand typicall contains 25% lanthanum.
Uses
It is used in the electodes of high-intensity, carbon-arc lights. Also used in the production of high-grade europium metal. Because it gives glass refractive properties, it is used in expensive camera lenses.
State at 20 °C
Solid
Group
Group Name: Transition MetalÂ
Group in periodic table: 3b
Period in periodic table:Â 6
Atomic Number
57Learn more about the atomic number.
Atomic Mass
138,9055
Learn more about the atomic mass.
Stable Isotopes
La138 percent abundance: .09% La139 percent abundance: 99.91%
Learn more about stable isotopes.
Radioactive Isotopes
La132-137, La 140-142
Learn more about radioactive isotopes.
Atomic Structure
Crystalline Structure
Hexagonal
Learn more about crystalline structure
Shells
Electrons per energy level: 2,8,18,18,9,2
Learn more about electron shells
Electron Configuration
1s2 2s2 2p6 3s2 3p6 4 s2 3 d10 4 p6 5 s2 4 d10 5 p6 6 s2 5 d1
Learn more about electron configuration.
Abbreviated Configuration
[Xe] 5d1 6s2
Learn more about abbreviated electron configuration.
Valence Electrons
3
Learn more about valence electrons
Atom Size
Atomic Radius
2.74 Ã…
Learn more about atomic radius.
Covalent Radius
1.69 Ã…
Learn more about covalent radius.
Ionic Radius
1.16 (+3) Ã…
Learn more about ionic radius.
Molar Volume
20.73 cm³/mol
Learn more about molar volume.
Chemical Properties
Common Oxidation States
First Ionization Energy
First Ionization Potential
Second Ionization Potential
Third Ionization Potential
Physical Properties
Density
Electrical Conductivity
Thermal Conductivity
Elastic Modulus
Coefficient of Thermal Expansion
Learn more about coefficient of thermal expansion.
Heat Properties
Other heat related physical properties:
Melting Point
Boiling Point
Specific Heat
0.19 J/gK
Learn more about specific heat.
Learn more about specific heat.
Heat of Fusion
6.20 kJ/mol
Learn more about heat of fusion.
Heat of Vaporization
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Along with basic element information, it also comes with color coded info about: State (Gas, Liquid or Solid at room temperature), Groups/series details and much more...
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