PERIODIC TABLE

Barium

Atomic No. 56 Ba Barium

About Barium

Barium is an alkaline earth metal with atomic number 56 that generally forms compounds in the +2 oxidation state. Its compounds include barium titanate for dielectric ceramics and barium sulfate for applications requiring high density or radiopacity. Barium metaphosphate contributes to specialty phosphate glass compositions, including glasses investigated as hosts for rare earth ions in luminescent and optical gain materials.

Properties

Atomic Number
56
Atomic Symbol
Ba
Atomic Mass
137.327
CAS No.
7440-39-3
Density
3.51 g/cm³
Series
alkaline earth metal
Melting Point
727°C
Boiling Point
1,870°C
Thermal Conductivity
0.18 W/cm °C
Heat of Fusion
8 kJ/mol
Heat of Vaporization
140 kJ/mol
Electronegativity
0.89 pauling
Crystal Structure
Cubic
Electrical Conductivity
2.9×106 S/m

Barium Products

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