Is Fe3O4 semiconductor or metal

Fe₃O₄, also known as magnetite, is considered a type of mixed-valence iron oxide. It exhibits properties of both a semiconductor and a metal, making it a unique material. In certain conditions, it can behave like a metal due to its high conductivity, while under other conditions, it shows semiconductor-like behavior, particularly in terms of its electronic band structure. Its versatility in electrical properties is significant for various applications, including magnetic and electronic devices.