What is barium carbonate used for? What is barium most commonly used for? Which pigment is stronger Barium carbonate or Zirconium Silicate. Difference between Barium carbonate and Titanium Dioxide

BaCO₃ 

Barium carbonate is the inorganic compound with the formula BaCO3. Like most alkaline earth metal carbonates, it is a white salt that is poorly soluble in water. It occurs as the mineral known as witherite. In a commercial sense, it is one of the most important barium compounds.
Barium Carbonate or BaCO3 is also called Whiterite named after William Withering who discovered this white mineral in 1784 from barytes.

Uses: 

Some of the major commercial applications of barium carbonate / BaCO3 includes glass, oil-drilling, photographic, ceramic, enamel, barium magnetic materials, paint, brick, and chemical industries.

It is mainly used to remove sulfate impurities from feedstock of the chlor-alkali process. Otherwise it is a common precursor to barium-containing compounds such as ferrites.

Other uses

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 colouring oxides to produce unique colours 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 sulfate and magnesium sulfate) that cause efflorescence.

Formula: BaCO₃
Molecular Weight: 197.34 g/mol
Form: white crystals, Odorless
CAS Number: 513-77-9
Density: 4.286 g/cm³
Synonyms:  Carbonic acid, barium salt, Barium monocarbonate, Pigment White 10, Witherite, Baryta Carbonica, Nezudai