Barium Oxychloride, BaCl₂.BaO.5H₂O

By the action of barium hydroxide on barium chloride in boiling aqueous solution, the compound BaCl₂.BaO.5H₂O, or mixed crystals of barium chloride and barium hydroxide, may separate, according to the proportions employed. The oxychloride crystallises in small pearly plates, which are attacked by water, alcohol, or carbon dioxide. In vacuo part of the water of crystallisation is lost. Andre at first gave the formula as BaCl₂.BaO.8H₂O, but later fixed the number of molecules of water as five.