Barium


Barium constitutes 0.4 - 0.5% of the Earth's crust. The most common barium minerals are barite or barytes which contains BaSO4, and witherite with the carbonate BaCO3.

Barium minerals are heavy. For this reason is also known as heavy spar. The high density of barite permits its ready separation from clay and other material associated with many barite deposits.