Tags: Chemical Compound, Chemical Substance.
Uranium dioxide or uranium(IV) oxide (UO2) also known as urania or uranous oxide is an oxide of uranium and is a black radioactive crystalline powder that naturally occurs in the mineral uraninite. It is used in nuclear fuel rods in nuclear reactors. A mixture of uranium and plutonium dioxides is used as MOX fuel. Prior to 1960 it was used as yellow and black color in ceramic glazes and glass.