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Chemical compound From Wikipedia, the free encyclopedia
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.
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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 |
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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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]
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]
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