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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  • Boehmite — or Böhmite is an aluminium oxide hydroxide (γ AlO(OH)) mineral, a component of the aluminium ore bauxite. It is dimorphous with diaspore. It crystallizes in the orthorhombic dipyramidal system and is typically massive in habit. It is white with… …   Wikipedia

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  • boehmite — noun Etymology: German Böhmit, from Johann Böhm (Boehm) died 1952 German chemist Date: circa 1929 a mineral consisting of an orthorhombic form of aluminum oxide and hydroxide AlO(OH) found in bauxite …   New Collegiate Dictionary

  • boehmite — noun A mixed oxide and hydroxide of aluminium …   Wiktionary

  • boehmite — boehm•ite [[t]ˈbeɪ maɪt, ˈboʊ [/t]] n. mir a mineral, hydrous aluminum oxide, AlO(OH), a major component of bauxite • Etymology: 1925–30; < G Böhmit, after J. Böhm, 20th cent. German scientist; see ite I …   From formal English to slang

  • boehmite — noun also böhmite ˈbāˌmīt, ˈbōˌm ( s) Usage: sometimes capitalized Etymology: German böhmit, from J.Böhm (Boehm), 20th century German scientist + German it ite …   Useful english dictionary

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