Synthesis and Study of Uranates of Rare-Earth Elements of Compositions LnU3O10.5·6H2O (Ln = La, Ce, Pr, Nd, Sm), LnU6O19.5·10H2O (Ln = Nd, Sm, Eu, Gd, Tb, Dy), and LnU2O7.5 (Ln = Dy, Ho, Er, Tm, Yb, Lu).

Autor:	Chernorukov, N. G., Nipruk, O. V., Klin'shova, K. A., Chernorukov, G. N., Tumaeva, O. N.
Předmět:	RARE earth metals ANALYTICAL chemistry X-ray diffraction ELECTRONIC structure CHEMICAL yield THERMOGRAPHY
Zdroj:	Radiochemistry; Mar2021, Vol. 63 Issue 2, p141-150, 10p
Abstrakt:	The interaction of synthetic skupite UO3·2.25H2O with aqueous solutions of La, Ce, Pr, Nd, Sm, Eu,Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu nitrates under hydrothermal conditions at a temperature of 200°C and varied acidity of the reaction medium yielded 17 previously unknown crystalline compounds of compositions LnU3O10.5·6H2O (Ln = La, Ce, Pr, Nd, Sm), LnU6O19.5·10H2O (Ln = Nd, Sm, Eu, Gd, Tb, Dy), LnU2O7.5 (Ln = Dy, Ho, Er, Tm, Yb, Lu). The methods of chemical analysis, X-ray diffraction analysis, IR spectroscopy, and thermography were used to determine their composition and structure, and their dehydration and thermal decomposition processes were examined. It was shown that the radii and the electronic structure of the atoms affect the composition and structure of the compounds obtained. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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