IR spectroscopic study of dehydration products of UF4 and PUF4 crystal hydrates in an anhydrous HF current

Abstract

1. IR-spectrometric, X-ray phase, and crystallo-optic studies were run with the products obtained by dehydration of uranium and plutonium tetrafluorides of the rhombic crystal class and of monoclinic uranium tetrafluoride in a current of hydrogen fluoride. 2. It was shown that the dehydration of the rhombic uranium and plutonium tetrafluorides in a current of hydrogen fluoride is accompanied by the formation of previously not described hydrate forms. 3. The monoclinic crystal hydrate UF4 · (4/3)H2O does not form intermediate hydrate forms when it is dehydrated in an HF current. 4. The final dehydration products of the crystal hydrates studied are the corresponding anhydrous monoclinic salts UF4 and PuF4.