Isomorphism in the (NH4)2Th(NO3)6-K2Th(NO3)6-Rb2Th(NO3)6 system |
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Authors: | N. G. Chernorukov A. V. Knyazev A. A. Sazonov |
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Affiliation: | (1) Nizhni Novgorod State University, Nizhni Novgorod, Russia |
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Abstract: | Syntheses were developed, and compounds of composition (NH4)2x K2y Rb2z Th(NO3)6(x + y + z = 1) were prepared. These compounds were structurally studied using X-ray diffraction and IR spectroscopy. Incomplete miscibility in the solid phase of the title system was found, and the impossibility of existence of a hexanitratothorate complex in the (NH4)2Th(NO3)6-K2Th(NO3)6 system at 298.15 K and the component molar ratio 1: 3 was demonstrated. Calorimetric standard enthalpies of formation and mixing at 298.15 K were determined. Original Russian Text ? N.G. Chernorukov, A.V. Knyazev, A.A. Sazonov, 2009, published in Zhurnal Neorganicheskoi Khimii, 2009, Vol. 54, No. 7, pp. 1066–1071. |
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