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bauxite 中文解釋 wordnet sense Collocation Usage Collins Definition
Noun
/ˈbôksīt/,
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An amorphous clayey rock that is the chief commercial ore of aluminum. It consists largely of hydrated alumina with variable proportions of iron oxides,
  1. An amorphous clayey rock that is the chief commercial ore of aluminum. It consists largely of hydrated alumina with variable proportions of iron oxides

  1. a clay-like mineral; the chief ore of aluminum; composed of aluminum oxides and aluminum hydroxides; used as an abrasive and catalyst
  2. (bauxitic) resembling or containing bauxite
  3. Bauxite is the most important aluminium ore. This form of rock consists mostly of the minerals gibbsite Al(OH)3, boehmite γ-AlO(OH), and diaspore α-AlO(OH), in a mixture with the two iron oxides goethite and hematite, the clay mineral kaolinite, and small amounts of anatase TiO2. ...
  4. a rock in which aluminum is found in high concentrations.
  5. A naturally occurring rock with one or more minerals containing aluminium, oxygen and hydrogen. Globally, most bauxite is used to produce alumina, which is used to produce aluminium. For more information see Aluminium (Geoscience Australia).
  6. An ore of aluminum consisting of moderately pure hydrated alumna, Al2O3× 2H2O.
  7. One of the ores from which alumina is extracted and from which aluminum is eventually smelted. Bauxite usually contains at least 45 percent aluminum oxide, and the best grades have a low silica content. About 4 pounds of bauxite is required to produce 1 pound of aluminum.
  8. A whitish to reddish mineral composed largely of hydrates of alumina having a composition of Al2O3·2H2O. It is the most important ore (source) of aluminum, alumina abrasives, and alumina-base refractories.
  9. the raw material mined from the earth used to make aluminum.
  10. The only commercial ore of aluminum, corresponding essentially to the formula Al2O3xH2O.
  11. A sedimentary rock that consists principality of one or more hydrates of alumina (diaspore, gibbsite, boehmite), and that may also contain clay minerals and hydrated iron oxides.
  12. a luminum ore most commonly formed in deeply weathered rocks. In some locations, deeply weathered volcanic rocks, usually basalt. It is essentially formed of Al-hydroxides (gibbisite, boehmite and diaspore).
  13. (in  mineral deposit: Laterites)