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UV is the +5 oxidation state of uranium which is found in the form of [UO2]1+. This species is known as pentavalent uranyl cation and has a low stability due to the disproportionation into tetravalent and hexavalent uranium species. 2UV → UIV + UVI 1. * Wyartite – Ca[UV(UVIO2)2(CO3)O4(OH)](H2O)7 2. * Dehydrated Wyartite – Ca(CO3)[UV(UVIO2)2O4(OH)](H2O)3

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  • Pentavalent uranyl complexes (en)
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  • UV is the +5 oxidation state of uranium which is found in the form of [UO2]1+. This species is known as pentavalent uranyl cation and has a low stability due to the disproportionation into tetravalent and hexavalent uranium species. 2UV → UIV + UVI 1. * Wyartite – Ca[UV(UVIO2)2(CO3)O4(OH)](H2O)7 2. * Dehydrated Wyartite – Ca(CO3)[UV(UVIO2)2O4(OH)](H2O)3 (en)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Synthesis_of_pentavalent_uranyl_complexes_using_electrochemical_reduction_method.png
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  • UV is the +5 oxidation state of uranium which is found in the form of [UO2]1+. This species is known as pentavalent uranyl cation and has a low stability due to the disproportionation into tetravalent and hexavalent uranium species. 2UV → UIV + UVI The oxidation states of uranium compounds vary from +2 to +6 (UII - UVI). Out of all these oxidation states +6 is the most common one and it is found in the form of [UO2]2+ (uranyl dication). This hexavalent form of uranium species is known to be the most thermodynamically stable species and it is soluble in water. Even though the uranium chemistry is well explored pentavalent uranyl chemistry is under developed due to the low stability of these compounds. There are two naturally occurring pentavalent uranium-containing minerals reported. 1. * Wyartite – Ca[UV(UVIO2)2(CO3)O4(OH)](H2O)7 2. * Dehydrated Wyartite – Ca(CO3)[UV(UVIO2)2O4(OH)](H2O)3 (en)
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