(La2O3)
La2O3 is a rare-earth oxide typically crystallizing in a hexagonal structure at room temperature, with the ability to transform into cubic phases at higher temperatures. It is a wide band gap insulator with strong basic character, which makes it highly reactive toward moisture and carbon dioxide, often forming hydroxides or carbonates upon exposure to air. La2O3 is widely used in catalysis, particularly as a promoter or support material due to its ability to enhance catalytic activity and thermal stability. It also finds applications in optical materials, high-k dielectrics, and advanced ceramics, where its dielectric properties and chemical stability are advantageous.
