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Transactions of the INDIAN CERAMIC SOCIETY   Vol. 05  1946
ALUMINIUM ORES*
N. L. Sharma,
Pages : 125- 141
DOI : 10.1080/0371750X.1946.10877806
Abstract
Of all the metallic elements, aluminium is the most abundant in the earth's crust. The metal is found in nature not in a free state but in combination, and it constitutes about 8 per cent of the crust. In terms of oxides, the percentage of alumina in the earth's crust is about 15; and alumina together with silica constitutes about 75 % of th~ crust. The presence of such a large proportion of aluminium in the crust has been explained as due to its great affinity for silicon in presence of oxygen, which fact is evident from the abundance of many aluminium silicate minerals, like clays, felspars, micas. etc., in the crust.
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