Synthesis and characterization of sodium and potassium uranates with the compositions Na2[(UO2)6O4(OH)6] · 8H2 and K2[(UO2)6O4(OH)6] · 8H2

Аннотация

Sodium and potassium uranates with the compositions M₂[(UO₂)₆O₄(OH)₆] · 8Н₂ (M = Na, K) have been synthesized by reacting schoepite (UO₃ · 2.25H₂O) with aqueous sodium hydroxide and potassium hydroxide solutions (pH 10–12) under hydrothermal conditions at 100°C for 15 days. Chemical analysis, X-ray diffraction, IR spectroscopy, and thermogravimetry data demonstrate that these compounds are perfect compositional and crystallographic analogs.