Aluminum Metallic Minerals

The main minerals of gibbsite in bauxite are (al203.3h20), boehmite (al203.h20), and diaspore, which are regarded as the same composition of boehmite, but with density and difficulty. Pure aluminum, alumina (Al203) anhydrous oxide, containing 52.9% aluminum and 47.1% oxygen. Bauxite can be as hard and soft as stone or mud, and it may occur in compacted soil (including fragile, re cemented), (pisolites) pellets, or hollow, branched material (tubes). It can be light yellow, pink, yellow, red, or white, or any combination.