Element Family
Post-Transition
Lanthanide
Space Group Name
Pm-3m
P63/mmc
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.
- Neodymium is not found free in nature, hence it is not a native metal.
- Neodymium metal found in minerals like Monazite and Bastnaesite.
Sources
Mining, Ores of metals
Found in Minerals, Mining
Who Discovered
Pierre Curie and Marie Curie
Carl Auer von Welsbach
Discovery
In 1898
In 1885
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.
- Neodymium-Iron-boron alloy is used to make permanent magnets.
- It is used in microphones, Mp3 player, loudspeakers, mobile phones, etc.
Industrial Uses
Aerospace Industry, Ammunition Industry
Aerospace Industry, Electrical Industry, Electronic Industry
Toxicity
Highly Toxic
Non Toxic
Present in Human Body
No
No
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
Chemical Stability, Corrosion, Flammable, Ionization
Electron Configuration
[Xe] 4f14 5d10 6s2 6p4
[Xe] 4f4 6s2
Crystal Structure
Monoclinic (MON)
Double Hexagonal Close Packed (DHCP)
Crystal Lattice
MON-Crystal-Structure-of-Polonium.jpg#100
DHCP-Crystal-Structure-of-Neodymium.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
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
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
NA
NA
Magnetic Ordering
Nonmagnetic
Paramagnetic
Electrical Property
Conductor
NA
Critical Temperature
Not Available
Not Available
Standard Molar Entropy
Not Available