Group Number
Not Available
Not Available
Element Family
Actinide
Lanthanide
Space Group Name
Pnma
Not Available
Space Group Number
Not Available
Interesting Facts
Not Available
- Promethium metal found in Pitchblende.
- Promethium metal is highly radioactive metal.
Sources
Made by Bombarding Uranium with Neutrons, Ores of metals
Found in Minerals, Mining
Who Discovered
Edwin McMillan and Philip H. Abelson
Chien Shiung Wu, Emilio Segrè, Hans Bethe
Discovery
In 1940
In 1942
Uses & Benefits
- Currently known uses of Neptunium metal are limited to research purpose only.
-
Neptunium’s isotope neptunium-237 is used as a neutron detectors.
- 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.
Other Uses
Alloys, Nuclear Research, Research Purposes
NA
Present in Human Body
No
No
Physical State
Solid
Solid
Speed of Sound
Not Available
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
Electrochemical Equivalent
Electron Work Function
Not Available
Not Available
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes, Solubility
Electron Configuration
[Rn] 5f4 6d1 7s2
[Xe] 4f5 6s2
Crystal Structure
Orthorhombic (ORTH)
Double Hexagonal Close Packed (DHCP)
Crystal Lattice
ORTH-Crystal-Structure-of-Neptunium.jpg#100
DHCP-Crystal-Structure-of-Promethium.jpg#100
Valence Electron Potential
Lattice Constant
Not Available
Lattice Angles
π/2, π/2, π/2
Unknown
Lattice C/A Ratio
Not Available
Not Available
Density At Room Temperature
Tensile Strength
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure at 2000 K
Not Available
Shear Modulus
Not Available
Bulk Modulus
Not Available
Young's Modulus
Not Available
Poisson Ratio
Not Available
Other Mechanical Properties
Ductile
NA
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Property
Conductor
Conductor
Electrical Conductivity
Not Available
Electron Affinity
Not Available
Molar Heat Capacity
Not Available
Critical Temperature
Not Available
Not Available
Thermal Expansion
Not Available
Enthalpy of Atomization
Not Available
Standard Molar Entropy
Not Available
Not Available