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Calculation of Phase Equilibria in the Th(NO3)4-HNO3-H2O System at 25°C

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Abstract

Pitzer's binary parameters of thorium nitrate were calculated from critically selected published data on the water vapor pressure in the Th(NO3)4-H2O system at 25°C. From data on the water vapor pressure in the Th(NO3)4-HNO3-H2O ternary system, the Pitzer's ternary parameters were calculated at 25°C. The branch of thorium nitrate hexahydrate crystallization in the ternary system was calculated in the region from 0 to 15 m HNO3 using complete set of Pitzer's binary and ternary parameters. The calculation results coincide with the experimental data on the solubility.

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  1. Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center, Russian Academy of Sciences, Apatity, Murmansk oblast, Russia

    A. M. Kalinkin

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Kalinkin, A.M. Calculation of Phase Equilibria in the Th(NO3)4-HNO3-H2O System at 25°C. Radiochemistry 43, 553–557 (2001). https://doi.org/10.1023/A:1014847506077

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