Aluminum oxide (Al2O3), also known as alumina, corundum, sapphire, or ruby, is one of the best insulators used in a wide ...

THE higher aluminium borides AlB10, AlB12 and their polymorphs are distinct from other higher metal borides in that the exact stoichiometric chemical formulae of the former are accompanied by an ...

By means of optical and electron microscopy and by preferential chemical dissolution, it has been found that this assumption is definitely incorrect for anodic films formed on aluminium.

The colors of rubies and emeralds are so striking that they define shades of red and green—ruby red and emerald green. But have you ever wondered how they get those colors?