Raudoksüüd

Raudoksüüd refers to compounds containing iron and oxygen. The most common forms are iron oxides, which are prevalent in nature and industry. Iron oxides are generally insoluble in water but can be soluble in strong acids. Their color varies depending on the oxidation state of the iron and the crystal structure, ranging from black to red, brown, and yellow.

Hematite, with the chemical formula Fe₂O₃, is a prominent example of an iron oxide and is a major source of iron ore. Magnetite, Fe₃O₄, is another important iron oxide known for its magnetic properties. Rust, a form of iron oxide, is typically a hydrated iron(III) oxide that forms when iron is exposed to oxygen and moisture.

Iron oxides have diverse applications. They are used as pigments in paints, ceramics, and cosmetics due to their stable colors. In industry, they are crucial in the production of iron and steel. Certain iron oxides also find use in catalysis and as magnetic materials. The study of raudoksüüd is fundamental to understanding geological processes, material science, and various industrial applications.