Uranyl peroxide

Uranyl peroxide

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Name = Uranyl peroxide
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ImageName = Uranyl peroxide
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Section2 = Chembox Properties
Formula = UO4·nH2O
MolarMass = 302.03 g/mol (as UO4)
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Uranyl peroxide or uranium peroxide hydrate (UO4·nH2O) is a pale-yellow, soluble peroxide of uranium. It is found present at one stage of the enriched uranium fuel cycle and in yellowcake prepared via the "in situ" leaching and resin ion exchange system. This compound, also expressed as:UO3·(H2O2)·(H2O), is very similar to uranium trioxide hydrate UO3·nH2O. The dissolution behaviour of both compounds are very sensitive to the hydration state (n can vary between 0 and 4). One main characteristic of uranium peroxide is that it consists of small needles with an average AMAD of about 1.1 µm.

The uranyl minerals Studtite, UO4·4H2O, and metastudtite, UO4·2H2O, are the only minerals discovered to date found to contain peroxide.

References

* [http://www.uic.com.au/uicchem.htm Some Chemistry of Uranium]
* [http://www.world-nuclear.org/sym/1999/freeman.htm The Smith Ranch Project: a 1990s In-situ Uranium Mine]
* [http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=14615533&dopt=Abstract Stability of peroxide-containing uranyl minerals.]


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