Uranyl Sulfate

Uranyl sulfate
Identifiers
CAS Number	anhydrous:: 1314-64-3; trihdyrate:: 20910-28-5;
3D model (JSmol)	anhydrous:: Interactive image; monohdyrate:: Interactive image; dihdyrate:: Interactive image; trihdyrate:: Interactive image; pentahydrate:: Interactive image;
ChemSpider	anhydrous:: 14131;
EC Number	anhydrous:: 215-240-3;
PubChem CID	anhydrous:: 14815; monohdyrate:: 129703883; dihdyrate:: 129772678; trihdyrate:: 71587042; pentahydrate:: 129763198;
UNII	trihdyrate:: 63MHT04U9C;
UN number	2909
	InChI InChI=1S/H2O4S.2O.U/c1-5(2,3)4;;;/h(H2,1,2,3,4);;;/q;;;+2/p-2 Key: XEZIPWHQHLVFHG-UHFFFAOYSA-L; monohdyrate:: InChI=1S/H2O4S.H2O.2O.U/c1-5(2,3)4;;;;/h(H2,1,2,3,4);1H2;;;/q;;;;+2/p-2 Key: GSSXPGLZRCAGDP-UHFFFAOYSA-L; dihdyrate:: InChI=1S/H2O4S.2H2O.2O.U/c1-5(2,3)4;;;;;/h(H2,1,2,3,4);21H2;;;/q;;;;;+2/p-2 Key: PJGZKVQRFYKDMB-UHFFFAOYSA-L; trihdyrate:: InChI=1S/H2O4S.3H2O.2O.U/c1-5(2,3)4;;;;;;/h(H2,1,2,3,4);31H2;;;/q;;;;2-2;/p-2 Key: SBCFBOOTSWECOA-UHFFFAOYSA-L; pentahydrate:: InChI=1S/H2O4S.5H2O.2O.U/c1-5(2,3)4;;;;;;;;/h(H2,1,2,3,4);51H2;;;/q;;;;;;;;+2/p-2 Key: FJVCKQOAEFENSP-UHFFFAOYSA-L;
	SMILES anhydrous:: [O-]S(=O)(=O)[O-].O=[U+2]=O; monohdyrate:: O.[O-]S(=O)(=O)[O-].O=[U+2]=O; dihdyrate:: O.O.[O-]S(=O)(=O)[O-].O=[U+2]=O; trihdyrate:: O.O.O.[O-2].[O-2].[O-]S(=O)(=O)[O-].[U]; pentahydrate:: O.O.O.O.O.[O-]S(=O)(=O)[O-].O=[U+2]=O;
Properties
Chemical formula	UO2SO4
Molar mass	366.09 g/mol
Density	3.28 g/cm3 @ 20 °C
Solubility in water	27.5 g/100 mL in water at 25 °C
Related compounds
Other anions	Uranyl chloride; Uranyl nitrate; Uranyl carbonate
Related compounds	Uranium dioxide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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	Infobox references

Uranyl sulfate describes a family of inorganic compounds with the formula UO₂SO₄(H₂O)_n. These salts consist of sulfate, the uranyl ion, and water. They are lemon-yellow solids. Uranyl sulfates are intermediates in some extraction methods used for uranium ores.^[1] These compounds can also take the form of an anhydrous salt.

Structure

The structure of UO₂(SO₄)(H₂O)_3.5 is illustrative of the uranyl sulfates. The trans-UO₂²⁺ centers are encased in a pentagonal bipyramidal coordination sphere. In the pentagonal plane are five oxygen ligands derived from sulfate and aquo ligands. The compound is a coordination polymer.^[2]

Uses

Aside from the large scale use in mining, uranyl sulfate finds some use as a negative stain in microscopy and tracer in biology. The Aqueous Homogeneous Reactor experiment, constructed in 1951, circulated a fuel composed of 565 grams of U-235 enriched to 14.7% in the form of uranyl sulfate.

The acid process of milling uranium ores involves precipitating uranyl sulfate from the pregnant leaching solution to produce the semi-refined product referred to as yellowcake.^[3]

Related compounds

the hydrogensulfate.^[4]
potassium uranyl sulfate, K₂UO₂(SO₄)₂, is a double salt used by Henri Becquerel in his discovery of radioactivity.

References

↑ Peehs, Martin; Walter, Thomas; Walter, Sabine; Zemek, Martin (2007). "Ullmann's Encyclopedia of Industrial Chemistry". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a27_281.pub2.
↑ Zalkin, Allan; Ruben, Helena; Templeton, David H. (1978). "Structure of a New Uranyl Sulfate Hydrate α-2UO₂SO₄^.7H₂O". Inorganic Chemistry 17 (12): 3701–3702. doi:10.1021/ic50190a075.
↑ "Metallurgy". MQes Uranium Inc.. http://www.mqes-uranium.com/metallurgy.html.
↑ Betke, Ulf; Wickleder, Mathias S. (2012). "Oleum and Sulfuric Acid as Reaction Media: The Actinide Examples UO2(S2O7)-lt (Low temperature), UO2(S2O7)-ht (High temperature), UO₂(HSO₄)₂, An(SO₄)₂ (An = Th, U), Th₄(HSO₄)₂(SO₄)₇ and Th(HSO₄)₂(SO₄)". European Journal of Inorganic Chemistry 2012 (2): 306–317. doi:10.1002/ejic.201100975.

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[1] Peehs, Martin; Walter, Thomas; Walter, Sabine; Zemek, Martin (2007). "Ullmann's Encyclopedia of Industrial Chemistry". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a27_281.pub2.

[2] Zalkin, Allan; Ruben, Helena; Templeton, David H. (1978). "Structure of a New Uranyl Sulfate Hydrate α-2UO₂SO₄^.7H₂O". Inorganic Chemistry 17 (12): 3701–3702. doi:10.1021/ic50190a075.

[3] "Metallurgy". MQes Uranium Inc.. http://www.mqes-uranium.com/metallurgy.html.

[4] Betke, Ulf; Wickleder, Mathias S. (2012). "Oleum and Sulfuric Acid as Reaction Media: The Actinide Examples UO2(S2O7)-lt (Low temperature), UO2(S2O7)-ht (High temperature), UO₂(HSO₄)₂, An(SO₄)₂ (An = Th, U), Th₄(HSO₄)₂(SO₄)₇ and Th(HSO₄)₂(SO₄)". European Journal of Inorganic Chemistry 2012 (2): 306–317. doi:10.1002/ejic.201100975.