Uranyl hydroxide

Uranyl hydroxide
Identifiers
CAS Number	211573-15-8 ;
3D model (JSmol)	Interactive image;
ChemSpider	4576989 ;
PubChem CID	5465112;
UN number	2909
	InChI InChI=1S/2H2O.2O.U/h2*1H2;;;/q;;;;+2/p-2 Key: VWIQIIGYDAPONF-UHFFFAOYSA-L ;
	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). verify (what is ?) Infobox references

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 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.

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