Alpha alumina

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A white, anhydrous, nonhygroscopic powder, Al2 O3 , produced when precipitated Al(OH), is calcined at 1,000 degrees C. It is the natural product of the Bayer process and other processes used (or proposed) to treat bauxite, clay, or other aluminum-bearing materials. Newton, 1
Source: Dictionary of Mining, Mineral, and Related Terms

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