Uranyl carbonate

Greenish- yellow solid

Fixed

Not soluble in water

Risk

Template: Infobox chemical / molecular formula search available

Uranyl carbonate, ( ( UO2) CO3 ) is the greenish-yellow uranyl salt of carbonic acid.

Occurrence

Uranyl carbonate comes as a mineral Rutherfordin in nature. Furthermore, more carbonate- Uranylminerale come in nature, including, for example Albrechtschraufit ( Ca4Mg (UO2 ) 2 ( CO3) 6F2 · 17 H2O), Andersonit ( Na2Ca [( UO2) (CO3 ) 3] (H2O) 5) Astrocyanit ( Cu2 ( Ce, Nd, La) 2UO2 (CO3 ) 5 ( OH) 2 · 1.5 H 2 O) and Liebigit ( Ca2UO2 (CO3) 3 · 11 H2O).

Properties

Anhydrous uranyl carbonate is stable up to 500 ° C. In aqueous solutions are formed at low hydroxide ion concentration Tricarbonat anionic complexes with the [ UO2 (CO3 ) 3] 4 - ion. In addition to the Tricarbonat complex even the Dicarbonatkomplex could [ UO2 ( CO3) 2 ] 2 - are detected in the solid state and in solution. In addition, is found in solution and the trimeric complex [ (UO2 ) 3 ( CO3 ) 6] 6 -, where the individual species are strongly influenced by pH dependent.

Representation

The Uranylcarbonate are mainly formed in basic medium at high CO2 partial pressures, since there may be no carbon dioxide liberation complexation in the acidic range.

Uranyl carbonate can be prepared by heating a mixture of uranium trioxide with carbon dioxide in water at a temperature of 300 ° C.

Health and environmental hazards

Uranyl carbonate is like all compounds of uranium radioactive and should therefore be treated with the appropriate caution and inclusion in the body are avoided.