boehmite

boehmite
/bay"muyt, boh"-/, n.
a mineral, hydrous aluminum oxide, AlO(OH), a major component of bauxite.
[1925-30; < G Böhmit, named after J. Böhm, 20th-century German scientist; see -ITE1]

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      white and relatively soft basic aluminum oxide [AlO(OH)] that is a common mineral in bauxite, in which it forms disseminated grains or pealike masses. It is especially abundant in European bauxites, sometimes as the main constituent; bauxites from the Western Hemisphere commonly contain only a few percent boehmite. Deposits exist at Gánt and Baratka, Hung.; Stangenrode, Ger.; Ayr, Scot.; and Recoux, Péreille, and Cadarcet, France. Boehmite is dimorphous (identical in composition but differing in crystal structure) with diaspore; its crystals have orthorhombic symmetry. For detailed physical properties, see oxide mineral (table).

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Universalium. 2010.

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