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The role of barium carbonate

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The role of barium carbonate

Post  gill on Mon Nov 15, 2010 10:04 pm


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.
Barium carbonate is widely used in the ceramics industry as an ingredient in glazes. It acts as a flux, a matting and crystallizing agent and combines with certain coloring oxides to produce unique colors not easily attainable by other means. Its use is somewhat controversial since some claim that it can leach from glazes into food and drink. To provide a safe means of use, BaO is often used in fritted form.
In the brick, tile, earthenware and pottery industries barium carbonate is added to clays to precipitate soluble salts (calcium and magnesium sulfates) that cause efflorescence.


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Re: The role of barium carbonate

Post  jyoti on Fri Nov 19, 2010 11:41 am

In general organic chemistry barium carbonate has a formula BaCO3.It can be Used in:
television glass, pressed glass, glazes, enamel frits, ceramics, and electroceramics.

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