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Title: RARE EARTH AND YTTRIUM FLUORIDES. SOLUBILITY RELATIONS IN VARIOUS MOLTEN NaF-ZrF$sub 4$ AND NaF-ZrF$sub 4$-UF$sub 4$ SOLVENTS

Abstract

The solubilities of the trifluorides of Ce, La, Sm, and Y were determined in a NaF--UF/sub 4/--ZrF/sub 4/ solvent of composition 50-4-48 mole%, respectively, at 550 to 85O deg C. The solubility of CeF/sub 3/ in NaF-- ZrF/sub 4/ solvents of varying composition was also determined. The log solubility vs. 1/T plot for the NaF--UF/sub 4/--ZrF/sub 4/ solvent is not linear except for YF/ sub 3/. An empirical correlation for the solubilities of Ce, La, and Sm fluorides is derived in the form of a solubility vs. cationlc radius plot, which could be used to predict the solubilities of other rare-earth fluorides to plus or minus 5%. The solubilities of CeF/sub 3/ and LaF/sub 3/ are found to be additive, whereas those for YF/sub 3/ and SmF/sub 3/ are not. Phase diagrams are given for the ternary systems NaF--CeF/sub 3/-ZrF/sub 4/ (incomplete), LaF/sub 3/- - CeF/sub 3/-solvent, and SmF/sub 3/--CeF/su b 3/solvent (solvent = NaF --UF/sub 4/-- ZrF/sub 4/). It is shown that a rare-earth poison depletion process from a molten fluoride fuel by solid-solvent extraction is feasible. (D.L.C.)

Authors:
; ; ;
Publication Date:
Research Org.:
Oak Ridge National Lab., Tenn.
Sponsoring Org.:
USDOE
OSTI Identifier:
4162147
NSA Number:
NSA-14-013669
Resource Type:
Journal Article
Journal Name:
Journal of Chemical and Engineering Data (U.S.)
Additional Journal Information:
Journal Volume: Vol: 5; Other Information: Orig. Receipt Date: 31-DEC-60
Country of Publication:
Country unknown/Code not available
Language:
English
Subject:
CHEMISTRY; CERIUM FLUORIDES; FUELS; LANTHANUM FLUORIDES; MELTING; PHASE DIAGRAMS; RARE EARTHS; SAMARIUM FLUORIDES; SODIUM FLUORIDES; SOLIDS; SOLUBILITY; SOLVENT EXTRACTION; SOLVENTS; TEMPERATURE; URANIUM TETRAFLUORIDE; YTTRIUM FLUORIDES; ZIRCONIUM FLUORIDES

Citation Formats

Ward, W T, Strehlow, R A, Grimes, W R, and Watson, G M. RARE EARTH AND YTTRIUM FLUORIDES. SOLUBILITY RELATIONS IN VARIOUS MOLTEN NaF-ZrF$sub 4$ AND NaF-ZrF$sub 4$-UF$sub 4$ SOLVENTS. Country unknown/Code not available: N. p., 1960. Web. doi:10.1021/je60006a004.
Ward, W T, Strehlow, R A, Grimes, W R, & Watson, G M. RARE EARTH AND YTTRIUM FLUORIDES. SOLUBILITY RELATIONS IN VARIOUS MOLTEN NaF-ZrF$sub 4$ AND NaF-ZrF$sub 4$-UF$sub 4$ SOLVENTS. Country unknown/Code not available. https://doi.org/10.1021/je60006a004
Ward, W T, Strehlow, R A, Grimes, W R, and Watson, G M. Fri . "RARE EARTH AND YTTRIUM FLUORIDES. SOLUBILITY RELATIONS IN VARIOUS MOLTEN NaF-ZrF$sub 4$ AND NaF-ZrF$sub 4$-UF$sub 4$ SOLVENTS". Country unknown/Code not available. https://doi.org/10.1021/je60006a004.
@article{osti_4162147,
title = {RARE EARTH AND YTTRIUM FLUORIDES. SOLUBILITY RELATIONS IN VARIOUS MOLTEN NaF-ZrF$sub 4$ AND NaF-ZrF$sub 4$-UF$sub 4$ SOLVENTS},
author = {Ward, W T and Strehlow, R A and Grimes, W R and Watson, G M},
abstractNote = {The solubilities of the trifluorides of Ce, La, Sm, and Y were determined in a NaF--UF/sub 4/--ZrF/sub 4/ solvent of composition 50-4-48 mole%, respectively, at 550 to 85O deg C. The solubility of CeF/sub 3/ in NaF-- ZrF/sub 4/ solvents of varying composition was also determined. The log solubility vs. 1/T plot for the NaF--UF/sub 4/--ZrF/sub 4/ solvent is not linear except for YF/ sub 3/. An empirical correlation for the solubilities of Ce, La, and Sm fluorides is derived in the form of a solubility vs. cationlc radius plot, which could be used to predict the solubilities of other rare-earth fluorides to plus or minus 5%. The solubilities of CeF/sub 3/ and LaF/sub 3/ are found to be additive, whereas those for YF/sub 3/ and SmF/sub 3/ are not. Phase diagrams are given for the ternary systems NaF--CeF/sub 3/-ZrF/sub 4/ (incomplete), LaF/sub 3/- - CeF/sub 3/-solvent, and SmF/sub 3/--CeF/su b 3/solvent (solvent = NaF --UF/sub 4/-- ZrF/sub 4/). It is shown that a rare-earth poison depletion process from a molten fluoride fuel by solid-solvent extraction is feasible. (D.L.C.)},
doi = {10.1021/je60006a004},
url = {https://www.osti.gov/biblio/4162147}, journal = {Journal of Chemical and Engineering Data (U.S.)},
number = ,
volume = Vol: 5,
place = {Country unknown/Code not available},
year = {1960},
month = {4}
}