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Identifiers | |||
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3D model (JSmol)
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ChemSpider |
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ECHA InfoCard | 100.013.856 | ||
EC Number |
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PubChem CID
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UNII |
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UN number | 2909 | ||
CompTox Dashboard (EPA)
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Properties | |||
UO2SO4 | |||
Molar mass | 366.09 g/mol | ||
Density | 3.28 g/cm3 @ 20 °C | ||
27.5 g/100 mL in water at 25 °C | |||
Related compounds | |||
Other anions
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Uranyl chloride Uranyl nitrate Uranyl carbonate | ||
Related compounds
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Uranium dioxide | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa).
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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). "Uranium, Uranium Alloys, and Uranium Compounds". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a27_281.pub2. ISBN 978-3527306732.
- ^ 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. Retrieved 2 June 2012.
- ^ 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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