Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chemical compound
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.
^Leinders, Gregory; Cardinaels, Thomas; Binnemans, Koen; Verwerft, Marc (2015). "Accurate lattice parameter measurements of stoichiometric uranium dioxide". Journal of Nuclear Materials. 459: 135–42. Bibcode:2015JNuM..459..135L. doi:10.1016/j.jnucmat.2015.01.029. S2CID 97183844.
^ abZumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A23. ISBN 978-0-618-94690-7.
Uraniumdioxide or uranium(IV) oxide (UO2), also known as urania or uranous oxide, is an oxide of uranium, and is a black, radioactive, crystalline powder...
hexavalent uranium compounds which form on oxidation of uraniumdioxide often form insoluble hydrated uranium trioxide phases. Thin films of uraniumdioxide can...
Uranium oxide is an oxide of the element uranium. The metal uranium forms several oxides: Uraniumdioxide or uranium(IV) oxide (UO2, the mineral uraninite...
air, uranium metal becomes coated with a dark layer of uranium oxide. Uranium in ores is extracted chemically and converted into uraniumdioxide or other...
a by-product of lanthanide and uranium production. Thorianite is the name of the mineralogical form of thorium dioxide. It is moderately rare and crystallizes...
into uranium hexafluoride and production of the fuel (again usually uraniumdioxide, but sometimes uranium carbide, uranium hydride or uranium nitride)...
conductivity of uraniumdioxide is very low compared with that of zirconium metal, and it goes down as the temperature goes up. Corrosion of uraniumdioxide in water...
to uranium trioxide in the enrichment of uranium. Uraniumdioxide and uranium tetrafluoride are intermediates in the process which ends in uranium hexafluoride...
fueled with natural uranium in the pure metal (U) or uraniumdioxide (UO2) ceramic forms. However, experimental fuelings with uranium trioxide (UO3) and...
Uraninite, also known as pitchblende, is a radioactive, uranium-rich mineral and ore with a chemical composition that is largely UO2 but because of oxidation...
Yellowcake is hazardous when inhaled. Uranium ore deposits Uranium mining Uraninite, an ore that is mostly uraniumdioxide (UO2) Yellowcake forgery, fraudulently...
at the boundary between the uraniumdioxide grains, but the majority of the fission products remain in the uraniumdioxide as solid solutions. A paper...
uraniumdioxide (UO 2) and uranium trioxide (UO 3). Other uranium oxides such as uranium monoxide (UO), diuranium pentoxide (U 2O 5), and uranium peroxide...
"to either uraniumdioxide, which can be used as the fuel for those types of reactors that do not require enriched uranium, or into uranium hexafluoride...
nuclear fuel is uraniumdioxide or a mixed uranium/plutonium dioxide. This has a higher melting point than the actinide metals. Uraniumdioxide resists corrosion...
gas is known as uranium hexafluoride, which is created by combining hydrogen fluoride, fluorine gas, and uranium oxide. Uraniumdioxide is also present...
Depleted uranium (DU; also referred to in the past as Q-metal, depletalloy or D-38) is uranium with a lower content of the fissile isotope 235U than natural...
Thorium dioxide occurs as the rare mineral thorianite. Due to its being isotypic with uraniumdioxide, these two common actinide dioxides can form solid-state...
uranium sesquicarbide (U2C3, CAS number 12076-62-9), and uranium acetylide (UC2, CAS number 12071-33-9). Like uraniumdioxide and some other uranium compounds...
the element uranium in one of the oxidation states 4, 5 or 6. A typical chemical formula is MxUyOz, where M represents a cation. The uranium atom in uranates(VI)...
A 220 MW PHWR fuel bundle contains 15.2 kg of natural uraniumdioxide (UO2). Uraniumdioxide pellets, which generate heat while undergoing fission, also...
+ H2 → UO2 + H2O Reacting uraniumdioxide with hydrofluoric acid changes it to uranium tetrafluoride, which yields uranium metal upon reaction with magnesium...
to leak into the environment. Spent uraniumdioxide fuel is very insoluble in water, it is likely to release uranium (and fission products) even more slowly...
This page describes how uraniumdioxide nuclear fuel behaves during both normal nuclear reactor operation and under reactor accident conditions, such...
said to be similar to that of uraniumdioxide dihydrate. It is precipitated by adding aqueous ammonium hydroxide after uranium extraction by tertiary amines...
environment. In the presence of oxygen (O2), uraniumdioxide (UO2) is oxidized to U3O8, whereas uranium trioxide (UO3) loses oxygen at temperatures above...
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