Like most alkaline earth metal carbonates, it is a white salt that is poorly soluble in water.
[6] It is mainly used to remove sulfate impurities from feedstock of the chlor-alkali process.
[5] Barium carbonate is widely used in the ceramics industry as an ingredient in glazes.
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.
"Preparation and Characterization of Barium Carbonate Nanoparticles - Volume 2 Number 4 (Aug. 2011) - IJCEA".