is pronounced Ahhll-you-mini-um and not ah - loo - min - um
If you read up on the etymology of the words you'll find that both spellings are correct. British chemist Humphry Davy originally gave it the name alumium, later settling on aluminum. An anonymous contributor to the Quarterly Review, a British political-literary journal, in a review of Davy's book, objected to aluminum and proposed the name aluminium, "for so we shall take the liberty of writing the word, in preference to aluminum, which has a less classical sound."