Uranium oxide is a chemical compound made up of uranium and oxygen, commonly represented as UO2. It is primarily used as fuel in nuclear reactors, where it undergoes fission to produce energy. This compound is typically found in a solid form and is known for its high density and ability to withstand high temperatures. In addition to its use in nuclear energy, uranium oxide is also a key material in the production of nuclear weapons. The extraction and processing of uranium oxide involve mining and refining uranium ore, which is essential for the nuclear industry.