Barium Molybdates

The normal salt BaMoO₄ is precipitated on addition of aqueous barium chloride to a neutral or ammoniacal solution of ammonium molybdate. By fusion of a mixture containing sodium molybdate (2 parts), barium chloride (6 parts), and sodium chloride (3 parts), barium molybdate may be obtained as a crystalline mass consisting of tetragonal pyramids with a:c = 1:1.6232, and of density 4.648 at 19.5° C. It is practically insoluble in water, 1 part of the salt dissolving in 17,200 parts of the solvent at 23° C. It is more readily soluble in presence of ammonium nitrate.