There are other sources of alumina, including clay and oil shale, but they are not economical at a commercial scale. The USGS estimates global bauxite resources to be between 55 billion and 75 ...

WHILE deposits of bauxite, that is, of the aluminium hydroxides gibbsite and diaspore, are greatly in request as sources of aluminium, bauxitic clays are also of considerable value for the lining ...

Learning about the aluminum production from countries around the world offers insight into the important industrial metal, ...