STUDIES ON TTA COMPLEXES WITH METAL IONS .4. INVESTIGATIONS OF SOME CRYSTALLINE FORMS OF URANYL-TTA COMPLEX

Crystals of uranyl-TTA complex (UO2T2) have been prepared from various solvents. Two different monoclinic forms crystallize from ethanol and methanol, while one basic orthorhombic form crystallizes from benzene or carbon tetrachloride. Single-crystal, powder diffraction, chemical, optical, spectroscopic and melting point data are presented for the different forms. Monoclinic crystals obtained from ethanol and methanol transform to the orthorhombic form on exposure to air. Data are presented on the transformation, which involves an exchange between solvated alcohol and water hydration. The effect of solvated alcohol on the i.r. spectrum is discussed. © 1968.