Synthesis and study of potassium uranates K2U6O19 and K2U4O13·2.2H2O

Potassium uranates K2U6O19 and K2U4O13·2.2H2O were synthesized by the reaction of aqueous solutions of uranyl acetate with aqueous solutions of potassium nitrate under hydrothermal conditions at 200°C. The compounds were examined by chemical analysis, X-ray diffraction, IR spectroscopy, and differential thermal analysis. The decomposition of the compounds was studied.