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AlO(OH) Gray, brown, or red orthorhombic mineral that is a major constituent of some bauxites.



(named after the 20th-century German mineralogist J. Böhm), a mineral with the composition AlOOH. It crystallizes into a rhombic system, forming fine, plastic crystalline particles. It is colorless and transparent. Its hardness on the mineralogical scale is 3.5, and its density is 3,020–3,060 kg/m3 Rarely found in pure form, boehmite usually occurs with other aluminum hydroxides in bauxite compositions.

References in periodicals archive ?
1977) reported that aluminum oxides (gibbsite, boehmite, corundum) provided more reactive surfaces for P sorption than do iron oxides (goethite, hematite, lepidocrocite).
Aluminum hydroxide minerals in various proportions except bauxite are conventionally found in Gibbsite with the combination of [Al (OH) 3] and polymorphs like boehmite and diaspore [AlO (OH)].
31) analyzed the effect of roughness parameters on the superhydrophobic and AR properties of boehmite film.
Boehmite is provided by Sasol Germany GmbH under the name Disperal 40.
Presentations and speakers on September 17 will include the following: "Product commercialization one nanostep at a time," Karl Kamena, Southern Clay Products; "Nanocomposites--a new class of flame retardants for polymers and cable applications," Gunter Beyer, Kabelwerk Eupen AG; "Mineral flame retardants: Market outlook and new developments," Rene Herbiet, Albemarle; "Talc as an additive in flame retardants," Pascal Amigouet, Luzenac Europe; "Nanocomposites based on boehmite alumina," Olaf Torno, Sasol Germany GmbH; "Nanoflake graphite--properties and end-uses in fuel cells and composites," George C.
Aide and Cummings (1997) showed that chromate adsorption on boehmite was outer-sphere and pH dependent, with Cr adsorption increasing in the order: pH 4.
com/research/whtgbm/2012_deep_research) has announced the addition of the "2012 Deep Research Report on China Pseudo Boehmite Industry" report to their offering.
All of ABx bauxites are free of the refractory, high-temperature monohydrate alumina mineral called boehmite and levels of the deleterious reactive silica are very low.
prepared the superhydrophobic coatings by mixing boehmite nanopowder (20 nm) and anatase nanopowder (6 nm) with perfluroalkyl methacrylic copolymer (Dupont Zonyl 8740).
Schefe CR, Kappen P, Zuin L, Pigram P J, Christensen C (2009) Carboxylic acid addition modifies phosphate sorption on soil and boehmite surfaces: A solution chemistry and XANES spectroscopy study.
All deposits are gibbsite-rich (trihydrate) bauxite, low in reactive silica and free of refractory mineral boehmite (monohydrate).