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Reddish-brown bauxite Bauxite with US penny for comparison QEMSCAN mineral maps of bauxite ore-forming pisoliths. Bauxite (/ ˈ b ɔː k s aɪ t /) is a sedimentary rock with a relatively high aluminium content. It is the world's main source of aluminium and gallium.
Bauxite forms by the weathering of aluminum-rich and silica-poor rocks in hot, humid, climates, at places with good drainage. Under the proper conditions, weathering disintegrates the aluminium silicate minerals, and dissolves and removes the silica, creating bauxite. The mined US bauxite deposits have all been in the southeastern United States.
This is a list of prices of chemical elements.Listed here are mainly average market prices for bulk trade of commodities. Data on elements' abundance in Earth's crust is added for comparison.
The Bayer process is the principal industrial means of refining bauxite to produce alumina (aluminium oxide) and was developed by Carl Josef Bayer.Bauxite, the most important ore of aluminium, contains only 30–60% aluminium oxide (Al 2 O 3), the rest being a mixture of silica, various iron oxides, and titanium dioxide. [1]
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.
Iron mine in Itabira, Minas Gerais. Mining in Brazil is centered on the extraction of iron (the second largest global iron ore exporter), copper, gold, aluminum (bauxite-one of the 5 biggest world's productors), manganese (one of the 5 biggest world's productors), tin (one of the biggest world's productors), niobium (concentrates 98% of the known niobium reserves in the world), and nickel.
2023 bauxite production and reserves (thousands of tons) [1]; Country Production Reserves World: 400,000: 30,000,000 Australia 98,000: 3,500,000 Guinea 97,000: ...
Aluminium oxide is an amphoteric oxide of aluminium with the chemical formula Al 2 O 3. It is also commonly referred to as alumina or aloxite [1] in the mining, ceramic and materials science communities. It is produced by the Bayer process from bauxite.