Barium sulphate (BaSO4)
a white solid that is found naturally as the mineral barites. Barium sulphate is insoluble in water5 and can be prepared easily as a precipitate by adding sulphuric acid to barium chloride. Barium sulphate is an important industrial chemical. Under the name of ‘blanc fixe’ it finds use as a pigment extender in surface coating composition. It also finds use in the glass and rubber industries.

Barterite
a nonterrous alloy having 88.5% copper, 5% nickel, 5% tin, 1.5% silicon. Sp. gr. 8.80; m.p. 1070˚C. It offers good resistance to sulfuric acid in all dilutions up to 60%, sea water moist sulphurous atmospheres, and mine waters.

Barites
(heavy spar), refers to a mineral form of barium sulphate (BaSO4).

Basic salt
refers to a compound that can be regarded as being formed by replacing some of the oxide or hydroxide ions in a base by other negative ions. Basic salts are thus mixed salt-oxides (e.g., bismuth (III) chloride oxide, BiOCI) or salt-hydroxides (e.g. lead (II) chloride hydroxide, Pb (OH)CI).

Basic-oxygen process (BOP process)
a high-speed method of getting high-grade steel. It originated in thee linnz-Donnewitz (L-D) process. Molten pig iron and scrap are charged into a tilting furnace, having no tuyeres. The charge is converted to steel by blowing high-pressure oxygen onto the surface of the metal through a water-cooled lance. The excess heat produced enables upto 30% of scrap to get in corporated into the charge.