... Barite Powder Barite, barytes barium or heavy spar, a white, yellow, blue, red, or colorless mineral. It is a sulfate of barium, BaSO ... property is made use of in testing for the sulfate radical. It is practically insoluble under ordinary conditions in ... as satisfactory as blanc fixe, a chemically precipitated barium sulfate, or lithopone, a mixture of barium sulfate, zinc sulfide, and zinc oxide. 1. ...