… ‑ precious metals ( Chapter 71 and heading 28.43 ), base metals ( Chapters 72 to 76 and 78 to 81 ) and … Astatine............. At 85 Radioactive element (28.44). Barium.............. Ba 56 Alkaline‑earth metal (28.05). …
… hydroxide. (a) Sodium aluminate . Obtained by treating bauxite with sodium hydroxide solution. Occurs as a white … powder used for similar purposes to sodium aluminate. (g) Barium aluminate . Prepared from bauxite, barytes and coal; white or brown masses. Used for purifying …
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