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Uranium Oxides
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Chemicals
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Inorganics
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Inorganic Oxides
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Description

Uranium oxides are chemical compounds formed between uranium and oxygen, with the metal uranium capable of forming several distinct oxide species.

These compounds exist in various oxidation states and include uranium dioxide (UO₂), triuranium octoxide (U₃O₈), and uranium trioxide (UO₃), among others.

The most stable form is triuranium octoxide (U₃O₈), which typically comprises 70 to 90 percent of yellowcake, the concentrated uranium product extracted during mining.

Uranium dioxide is particularly significant as the primary oxide used in nuclear fuel rods for nuclear reactors, appearing as a black, radioactive crystalline powder that naturally occurs in the mineral uraninite.

These compounds are characterized by their radioactive properties and exist across a range of compositions rather than as strictly defined stoichiometric compounds.

 

 

 

 

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Uranium oxides, from left to right: Trioxide, Dioxide, and Octoxide https://www.reddit.com/r/chemistry/comments/18z8q0i/uranium_oxides_trioxide_dioxide_and_octoxide/
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Modified by UserPic  Kokel, Nicolas 1/12/2026 10:18 AM
Added 1/10/2026 3:12 PM