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Barium
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| Atomic Number: |
56 |
| Atomic Weight: |
137.327 |
| Element Type: |
Alkali Earth Metal |
| Crystal Structure: |
Cubic Body Centered |
| Melting Point: |
727.0°C = 1340.6°F = 1000.15 K |
| Boiling Point: |
1897.0°C = 3446.6°F = 2170.15 K |
| Critical Temp: |
°C = °F = K |
| Atomic Radius: |
2.78 Å (Å = Angstrom = 10-10 m) |
| Covalent Radius: |
1.98 Å |
| Electronegativity: |
0.89 |
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History
(Gr. barys, heavy) Baryta was distinguished from lime by Scheele in 1774; the elementwas discovered by Sir Humphrey Davy in 1808.
Sources
It is found only in combination with other elements, chiefly with sulfate and carbonateand is prepared by electrolysis of the chloride.
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