Barium carbonate ( BaCO3), also known as witherite, is a chemical compound used in rat poison, bricks, ceramic glazes and cement.
Witherite crystallizes in the orthorhombic system. The crystals are invariably twinned together in groups of three, giving rise to pseudo-hexagonal forms somewhat resembling bipyramidal crystals of quartz, the faces are usually rough and striated horizontally.
Witherite is readily altered to barium sulate by the action of water containing calcium sulfate in solution and crystals are therefore frequently encrusted with barytes. It is the chief source of barium salts and is mined in considerable amounts in Northumberland. It is used for the preparation of rat poison, in the manufacture of glass and porcelain, and formerly for refining sugar. It is also used for controlling the chormate to sulfate ratio in chomium electroplating baths.
Manufacture of Barium Salts, Pigments Glass, Ceramics, Pyrotechnics, Electronic Devices, Welding Rods, Ferrite magnet materials, Producing TV Kinescope, Optical Glass, Manufacture of Caustic Soda, Rat Poison etc.