Group Number
Not Available
Element Family
Post-Transition
Lanthanide
Space Group Name
Pm-3m
R_ 3m
Interesting Facts
- Polonium was the first radioactive element to be discovered.
- Polonium element and its compounds are highly radioactive.
- Its alloy with Beryllium provides source of neutrons.
- Samarium metals helps stimulating body metabolism.
- Samarium metals was 1st observed by Jean Charles Galissard de Marignac in Dydimia in 1853.
Sources
Mining, Ores of metals
Found in Minerals, Mining, Ores of Minerals
Who Discovered
Pierre Curie and Marie Curie
Lecoq de Boisbaudran
Discovery
In 1898
In 1879
Abundance In Universe
Not Available
Abundance In Sun
~-9999 %
Abundance In Meteorites
Not Available
Abundance In Earth's Crust
Not Available
Uses & Benefits
- Polonium metal has different Allotropes, it is used in antistatic devices and for research purpose.
- A 1 gram of Polonium can reach a temperature of 500°C, hence it is used as a heat source for space equipment.
- Magnets of Samarium cobalt alloy are stronger than that of Iron and hence, they are used in microwave application.
- Samarium metal also used in optical lasers and infrared absorbing glasses and as a neutron absorber.
Industrial Uses
Aerospace Industry, Ammunition Industry
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
Other Uses
Alloys
Alloys, In Nuclear Reactors
Toxicity
Highly Toxic
Slightly Toxic
Present in Human Body
No
Yes
Physical State
Solid
Solid
Color
Silver
Silvery White
Brinell Hardness
Not Available
Vickers Hardness
Not Available
Speed of Sound
Not Available
α Allotropes
α-polonium
Not Available
β Allotropes
β-polonium
Not Available
γ Allotropes
Not Available
Not Available
Pauling Electronegativity
Allred Rochow Electronegativity
Mulliken-Jaffe Electronegativity
Not Available
Allen Electronegativity
Not Available
Pauling Electropositivity
2nd Energy Level
Not Available
3rd Energy Level
Not Available
4th Energy Level
Not Available
Electrochemical Equivalent
Electron Work Function
Not Available
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility
Ionization, Radioactive Isotopes
Electron Configuration
[Xe] 4f14 5d10 6s2 6p4
[Xe] 4f6 6s2
Crystal Structure
Monoclinic (MON)
Rhombohedral (RHO)
Crystal Lattice
MON-Crystal-Structure-of-Polonium.jpg#100
RHO-Crystal-Structure-of-Samarium.jpg#100
Valence Electron Potential
Not Available
Lattice Angles
π/2, π/2, π/2
π/2, π/2, 2 π/3
Lattice C/A Ratio
Not Available
Not Available
Density At Room Temperature
Density When Liquid (at m.p.)
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure at 1000 K
Not Available
Shear Modulus
Not Available
Bulk Modulus
Not Available
Young's Modulus
Not Available
Poisson Ratio
Not Available
Other Mechanical Properties
NA
NA
Magnetic Ordering
Nonmagnetic
Paramagnetic
Electrical Property
Conductor
Conductor
Critical Temperature
Not Available
Not Available
Standard Molar Entropy
Not Available