Synthesis and study of new triple oxides of the series A{sup I}Nb{sup V}UO{sub 6}

New uranium-containing triple oxides with the compositions LiNbUO{sub 6} and NaNbUO{sub 6} and their crystal hydrates were synthesized ion-exchange reactions. The compounds were investigated by X-ray diffractometry, thermography, and IR spectroscopy. 4 refs., 3 tabs.