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Aluminum is a lightweight metal located in Group 13 of the periodic table, with atomic number 13. It is the third most abundant element in the Earth's crust after oxygen and silicon, constituting approximately 8% of the crust by mass. It does not occur in a free state in nature; instead, it exists primarily in minerals such as bauxite, feldspar, nepheline, mica, and cryolite in oxide or silicate forms. A naturally forming thin oxide layer on its surface provides inherent corrosion resistance. Du