Thermite with barium sulfate instead of gypsumAug 8, 2009 . I picked barium sulfate as an oxidizer because it is 4000 times less soluble in water than plaster and is always anhydrous. Also, the product.barium sulfate gypsum,Calcium sulfate - WikipediaCalcium sulfate (or calcium sulphate) is the inorganic compound with the formula CaSO4 and .. The main sources of calcium sulfate are naturally occurring gypsum and anhydrite, which occur at many . In the refining of zinc, solutions of zinc sulfate are treated with lime to co-precipitate heavy metals such as barium.
barium sulfate gypsum