Study of the State of Uranyl Orthovanadate (UO2)3(VO4)2Σ4H2O in Aqueous Solutions

摘要

The state of uranyl orthovanadate (UO2)3(VO4)22Σ4H2O in aqueous solutions was studied by the methods of chemical analysis, X-ray diffraction, and IR spectroscopy. Uranyl vanadate is transformed into compounds of other composition and structure upon contact with aqueous phases of various acidity. Equilibrium constants of reactions occurring in heterogeneous systems (UO2)3(VO4)22Σ4H2O naqueous solution were calculated from the data on the solubility. Phase diagrams of bottom solid phases and of equilibrium aqueous solutions were constructed.