Group Number
Not Available
Not Available
Element Family
Lanthanide
Lanthanide
Space Group Name
Not Available
P63/mmc
Space Group Number
Not Available
Interesting Facts
- Promethium metal found in Pitchblende.
- Promethium metal is highly radioactive metal.
- Lanthanum metal is highly malleable, ductile and sectile.
- If exposed to air Lanthanum metal oxidizes rapidly.
Sources
Found in Minerals, Mining
Found in Minerals, Mining, Ores of Minerals
Who Discovered
Chien Shiung Wu, Emilio Segrè, Hans Bethe
Carl Gustaf Mosander
Discovery
In 1942
In 1838
Abundance In Universe
Not Available
Abundance In Sun
~-9999 %
Abundance In Meteorites
Not Available
Abundance In Earth's Crust
Not Available
Abundance In Oceans
Not Available
Uses & Benefits
- It is used for research purpose. Very small amount of this metal is used in atomic batteries.
- Its radioactive decay is used for a phosphor to give off light. The light emitted is converted into electricity.
- It has no commercial uses, but its alloys are in high demand. Lanthanum and Nickel alloy is used for the hydrogen gas storage.
- The best-known use for mischmetal alloy of Lanthanum is; as a ‘flints’ for cigarette lighters.
Industrial Uses
NA
Electrical Industry, Electronic Industry
Other Uses
NA
Alloys, Mirror Manufacturing
Toxicity
Non Toxic
Low Toxic
Present in Human Body
No
Yes
Physical State
Solid
Solid
Color
Unknown
Silvery White
Mohs Hardness
Not Available
Brinell Hardness
Not Available
Vickers Hardness
Not Available
Speed of Sound
Not Available
α Allotropes
Not Available
Not Available
β Allotropes
Not Available
Not Available
γ Allotropes
Not Available
Not Available
Pauling Electronegativity
Not Available
Allred Rochow Electronegativity
Pauling Electropositivity
Not Available
5th Energy Level
Not Available
Electrochemical Equivalent
Electron Work Function
Not Available
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes, Solubility
Electron Configuration
[Xe] 4f5 6s2
[Xe] 5d2 6s2
Crystal Structure
Double Hexagonal Close Packed (DHCP)
Double Hexagonal Close Packed (DHCP)
Crystal Lattice
DHCP-Crystal-Structure-of-Promethium.jpg#100
DHCP-Crystal-Structure-of-Lanthanum.jpg#100
Valence Electron Potential
Lattice Constant
Not Available
Lattice Angles
Unknown
π/2, π/2, 2 π/3
Lattice C/A Ratio
Not Available
Density At Room Temperature
Density When Liquid (at m.p.)
Not Available
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure at 2000 K
Not Available
Other Mechanical Properties
NA
Ductile
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Property
Conductor
Conductor
Electrical Conductivity
Not Available
Molar Heat Capacity
Not Available
Critical Temperature
Not Available
Not Available
Enthalpy of Vaporization
Not Available
Standard Molar Entropy
Not Available