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A silvery-white, metallic element, belonging to the alkaline earth group. Symbol, Ba. Found chiefly in barite or heavy spar and witherite. All barium compounds that are water or acid soluble are poisonous. Used in paint, X-ray diagnostic work, glassmaking, oilwell drilling fluids, and pyrotechny. Handbook of Chemistry and Physics, 3

Source: Dictionary of Mining, Mineral, and Related Terms

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