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Atomic
Number:
Atomic Weight:
Element Type:
Crystal
Structure:
Melting Point:
Boiling Point:
Critical
Temp:
Atomic Radius:
Covalent Radius:
Electronegativity:
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56
137.327
Alkali Earth Metal
Cubic Body Centered
727.0°C = 1340.6°F = 1000.15 K
1897.0°C = 3446.6°F = 2170.15 K
°C
= °F = K
2.78 Å (Å = Angstrom = 10-10 m)
1.98 Å
0.89 |
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Discovery
(Gr. barys, heavy) Baryta was distinguished from lime by
Scheele in 1774; the elementwas discovered by Sir Humphrey
Davy in 1808.
Sources
Barium is only found combined with other elements, primarily
in barite or heavy spar (sulfate) and witherite (carbonate).
The element is prepared by the electrolysis of its chloride.
Uses
Barium is used as a 'getter' in vacuum tubes. Its compounds
are used in pigments, paints, glassmaking, as weighting
compounds, in the manufacture of rubber, in rat poison,
and in pyrotechnics.
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