Uranyl hydroxide

Uranyl hydroxide is a hydroxide of uranium with the chemical formula UO₂(OH)₂ in the monomeric form and (UO₂)₂(OH)₄ in the dimeric; both forms may exist in normal aqueous media. Uranyl hydroxide hydrate is precipitated as a colloidal yellowcake from oxidized uranium liquors near neutral pH.

Uranyl hydroxide

Identifiers
CAS Number	211573-15-8 N
3D model (JSmol)	Interactive image
ChemSpider	4576989 N
PubChem CID	5465112
UN number	2909
CompTox Dashboard (EPA)	DTXSID201027718
InChI InChI=1S/2H2O.2O.U/h2*1H2;;;/q;;;;+2/p-2 N Key: VWIQIIGYDAPONF-UHFFFAOYSA-L N
SMILES O=[U+2]=O.[OH-].[OH-]
Properties
Chemical formula	UH 2O 4
Molar mass	304.0424 g mol−1
Related compounds
Related compounds	Sulfuric acid Chromic acid Uranium trioxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

Uranyl hydroxide was once used in glassmaking and ceramics in the colouring of the vitreous phases and the preparation of pigments for high temperature firing. The introduction of alkaline diuranates (like sodium diuranate) into glasses leads to yellow by transmission, green by reflection; moreover these glasses become dichroic and fluorescent under ultraviolet rays.

Uranyl hydroxide is teratogenic and radioactive.

References

• The Structure of the a Form of Uranyl Hydroxide
• Alexander, C.A. (2005) "Volatilization of urania under strongly oxidizing conditions," Journal of Nuclear Materials, 346, 312–318.