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- Boehmite abstract "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 tints of yellow, green, brown or red due to impurities. It has a vitreous to pearly luster, a Mohs hardness of 3 to 3.5 and a specific gravity of 3.00 to 3.07. It is colorless in thin section, optically biaxial positive with refractive indices of nα = 1.644 - 1.648, nβ = 1.654 - 1.657 and nγ = 1.661 - 1.668.Boehmite occurs in tropical laterites and bauxites developed on alumino-silicate bedrock. It also occurs as a hydrothermal alteration product of corundum and nepheline. It occurs with kaolinite, gibbsite and diaspore in bauxite deposits; and with nepheline, gibbsite, diaspore, natrolite and analcime in nepheline pegmatites.It was first described by J. de Lapparent in 1927 for an occurrence in the bauxites of Mas Rouge, Les Baux-de-Provence, France, and named for the Bohemian-German chemist Johann Böhm (1895–1952) who carried out X-ray studies of aluminium oxide hydroxides in 1925 (and not for the German geologist Johannes Böhm (1857–1938) as often stated).".
- Boehmite thumbnail Böhmite-89904.jpg?width=300.
- Boehmite wikiPageExternalLink LepidocrStruc.HTM.
- Boehmite wikiPageID "1089245".
- Boehmite wikiPageRevisionID "542243727".
- Boehmite 2v "Measured: 74° to 88°, Calculated: 80°".
- Boehmite birefringence "δ = 0.017 - 0.020".
- Boehmite caption "Böhmite and Natrolite from Sagåsen , Mørje, Porsgrunn, Telemark, Norway".
- Boehmite category Oxide_minerals.
- Boehmite cleavage "Very good on {010}, good on {100}, and poor on {001}".
- Boehmite color "White, pale greyish brown; yellowish or reddish when impure; colorless in thin section".
- Boehmite dana "6.1".
- Boehmite diaphaneity "Translucent".
- Boehmite dispersion "weak".
- Boehmite formula "γ-AlO".
- Boehmite gravity "3.02".
- Boehmite habit "Tabular crystal rare, fine grained in pisolitic aggregates or disseminated".
- Boehmite hasPhotoCollection Boehmite.
- Boehmite luster "Vitreous, pearly on {010}".
- Boehmite mohs "3.5".
- Boehmite name "Boehmite".
- Boehmite opticalprop "Biaxial".
- Boehmite refractive "nα = 1.644 - 1.648 nβ = 1.654 - 1.657 nγ = 1.661 - 1.668".
- Boehmite streak "White".
- Boehmite strunz "4".
- Boehmite symmetry "Orthorhombic 2/m 2/m 2/m".
- Boehmite system "Orthorhombic dipyramidal".
- Boehmite unitCell "a = 3.693 Å, b = 12.221 Å, c = 2.865 Å; Z = 4".
- Boehmite subject Category:Aluminium_minerals.
- Boehmite subject Category:Hydroxide_minerals.
- Boehmite subject Category:Orthorhombic_minerals.
- Boehmite type Abstraction100002137.
- Boehmite type AluminiumMinerals.
- Boehmite type HydroxideMinerals.
- Boehmite type Material114580897.
- Boehmite type Matter100020827.
- Boehmite type Mineral114662574.
- Boehmite type OrthorhombicMinerals.
- Boehmite type Part113809207.
- Boehmite type PhysicalEntity100001930.
- Boehmite type Relation100031921.
- Boehmite type Substance100019613.
- Boehmite type ChemicalSubstance.
- Boehmite type Mineral.
- Boehmite type ChemicalObject.
- Boehmite type Thing.
- Boehmite comment "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 tints of yellow, green, brown or red due to impurities. It has a vitreous to pearly luster, a Mohs hardness of 3 to 3.5 and a specific gravity of 3.00 to 3.07.".
- Boehmite label "Bemit".
- Boehmite label "Boehmita".
- Boehmite label "Boehmite".
- Boehmite label "Boéhmite".
- Boehmite label "Böhmit".
- Boehmite label "Böhmite".
- Boehmite label "Бёмит".
- Boehmite label "勃姆石".
- Boehmite sameAs Böhmit.
- Boehmite sameAs Boehmita.
- Boehmite sameAs Boéhmite.
- Boehmite sameAs Böhmite.
- Boehmite sameAs Bemit.
- Boehmite sameAs m.025rqg8.
- Boehmite sameAs Q409757.
- Boehmite sameAs Q409757.
- Boehmite sameAs Boehmite.
- Boehmite wasDerivedFrom Boehmite?oldid=542243727.
- Boehmite depiction Böhmite-89904.jpg.
- Boehmite isPrimaryTopicOf Boehmite.
- Boehmite name "Boehmite".
