Search results
Results From The WOW.Com Content Network
Al(OH) 3 is built up of double layers of hydroxyl groups with aluminium ions occupying two-thirds of the octahedral holes between the two layers. [5] [6] Four polymorphs are recognized. [7] All feature layers of octahedral aluminium hydroxide units, with hydrogen bonds between the layers. The polymorphs differ in terms of the stacking of the ...
It fumes in moist air and hisses when mixed with liquid water as the Cl − ligands are displaced with H 2 O molecules to form the hexahydrate [Al(H 2 O) 6]Cl 3. The anhydrous phase cannot be regained on heating the hexahydrate. Instead HCl is lost leaving aluminium hydroxide or alumina (aluminium oxide): [Al(H 2 O) 6]Cl 3 → Al(OH) 3 + 3 HCl ...
corundum (Al 2 O 3) aluminium oxide hydroxides diaspore (α-AlO(OH)) boehmite or böhmite (γ-AlO(OH)) akdalaite (5Al 2 O 3 ·H 2 O) (once believed to be 4Al 2 O 3 ·H 2 O), also called tohdite; aluminium hydroxides. gibbsite (often designated as γ-Al(OH) 3, but sometimes as α-Al(OH) 3, [4] sometimes called hydrargillite or hydrargyllite)
2[Al(H 2 O) 6]Cl 3 Al 2 O 3 + 6 HCl + 9 H 2 O All four trihalides are well known. Unlike the structures of the three heavier trihalides, aluminium fluoride (AlF 3 ) features six-coordinate aluminium, which explains its involatility and insolubility as well as high heat of formation .
Aluminium carbide – Al 4 C 3 [12] Aluminium iodide – AlI 3 [13] Aluminium nitride – AlN [14] Aluminium oxide – Al 2 O 3 [15] Aluminium phosphide – AlP [16] Aluminium chloride – AlCl 3 [17] Aluminium fluoride – AlF 3 [18] Aluminium hydroxide – Al(OH) 3 [19] [20] Aluminium nitrate – Al(NO 3) 3 [21] Aluminium sulfide – Al 2 S 3 ...
In the laboratory AlOH can be made by heating aluminium, so that it vapourises into low pressure hydrogen peroxide vapour. [3] Another method is to condense a mixture of aluminium vapour, hydrogen and oxygen with argon into a solid at 10K. Along with AlOH, there are also Al(OH) 2, Al(OH) 3, HAl(OH) 2, cyc-AlO 2 and AlOAl molecules formed. [4]
The variation most commonly used in deodorants and antiperspirants is Al 2 Cl(OH) 5 (dialuminium chloride pentahydroxide). Aluminium chlorohydrate is also used as a coagulant in water and wastewater treatment processes to remove dissolved organic matter and colloidal particles present in suspension.
The presence of water in the solution is reportedly necessary; the electron rich amalgam will oxidize aluminium and generate hydrogen gas from water, creating aluminium hydroxide (Al(OH) 3) and free mercury. The electrons from the aluminium reduce mercuric Hg 2+ ion [clarification needed] to metallic mercury. The metallic mercury can then form ...