[{"from": "human", "value": "Provide a brief overview of this molecule. [O][=U][=O]"}, {"from": "gpt", "value": "The molecule is an oxide of uranium that occurs naturally in the mineral uraninite.  It is used for fuel in nuclear reactors. Uranium oxides are also used to colour glass and ceramics. Uranium is a chemical element that has the symbol U and atomic number 92. It is a normal part of rocks, soil, air, and water, and occurs in nature in the form of minerals. (L248, L249, L250)"}]