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“Aluminum is a metallic element—one of the principal constituents of the earth's crust. Only oxygen and silicon are more abundant. Aluminum does not occur naturally in its pure form, but only in a wide variety of compounds.” — George W. Stocking
Aluminum is a metallic element—one of the principal constituents of the earth's crust. Only oxygen and silicon are more abundant. Aluminum does not occur naturally in its pure form, but only in a wide variety of compounds.