Properties
Gibbsite has a typical metal hydroxide structure with hydrogen bonds. It is built up of double layers of hydroxyl groups with aluminium ions occupying two-thirds of the octahedral holes between the two layers.
Aluminium hydroxide is amphoteric. It dissolves in acid, forming Al(H2O)63+ (hexaaquaaluminium(3+)) or its hydrolysis products. It also dissolves in strong alkali, forming Al(OH)4- (tetrahydroxidoaluminate(1-)).
Read more about this topic: Aluminium Hydroxide
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