Important Barium Compound Barium carbonate: (BaCO₃), molecular weight: 197.34 g/mol , density: 4.286 g/cm3 , melting point: 811 °C . It is a white insoluble salt that occurs naturally as the mineral witherite. Barium carbonate can be readily precipitated by adding an alkali carbonate to a barium salt solution. On heating it decomposes reversibly with the formation of …
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