Abstract
The solubility and solubility product of europium trifluoride were measured by radiometric, potentiometric and conductometric methods. There are significant differences in the values of both solubility and solubility product obtained by the three different techniques. Due to reasons discussed in the text, radiometric values seem to be more acceptable than the others. The thermodynamic functions such as ΔH0, ΔG0 and ΔS0 for the dissolution process were also measured. The positive values of ΔH0 and ΔG0 and the negative value of ΔS0 are indicative of the slight solubility of EuF3. The dependence of solubility on pH and also on the fluoride concentration has also been studied. It was confirmed that europium forms a monofoluoride complex in aqueous solution. The stability constant of this complex was estimated.
Similar content being viewed by others
References
Pergamon Press Ltd. IUPAC Solubility Data Project Combined, News Letter 1, February 1980, Oxford, England.
P. C. STEVENSON, W. E. NERVIK, The Radiochemistry of the Rare Earths, Scandium, Yttrium and Actinium. NAS-NS: 3020, Publication under Nuclear Science Series, USAEC, Office of Technical Services, Dept. of Commerce, Washington 25, D. C., 1961, p. 18.
N. P. GALKIN, Yu. D. SHISHKOV, V. I. KHOMYABOV, Radiochimiya, 20 (1)(1978) 136.
G. DADAHAEVA, D. D. IKRAMI, Dokl. Akad. Nauk SSR., 19 (12) (1976) 31.
N. S. NIKOLAEV, Sh. A. ABDURAKHMANOV, Kh. Sh. DZHURAEV, Zh. Neorg. Khim., 19 (4) (1974) 1133.
V. P. VASILEV, E. V. KOZLOVSKII, Zh. Neorg. Khim., 22 (3) (1977) 853.
J. L. WEAVER, W. G. PURDY, Anal. Chim. Acta, 20 (1959) 376.
J. DA DILVA, J. R. FRAUSTO, Q. M. MANUELA, Rev. Port. Quim., 15 (1) (1973) 29.
J. B. WALKER, G. R. CHOPPIN, Thermodynamic Parameters of Fluoride Complexes of the Lanthanides, a chapter in the Lanthanide/Actinide Chemistry, Advances in Chemistry Series 71, ACS, Washington, D. C., 1967, p. 127.
H. H. WILLARD, Jr., MERRIT, L. L. DEAN, Instrumental Methods of Analysis (5th edition), D. Van Nostrand Co., New York, 1974, p. 741.
C. W. DAVIES, Ion Association, Butterworths, London, 1962.
M. Kh. KARAPETYANTS, M. L. KARAPETYANTS, Thermodynamic Constants of Inorganic and Organic Compounds (translated by J. SCHMORAH), Hemphery Science publishers, Incorp., Ann Arbor, Michigan, 1970.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Menon, M.P. Radiometric, potentiometric and conductometric measurements of the solubility and solubility product of europium trifluoride. J. Radioanal. Chem. 63, 283–294 (1981). https://doi.org/10.1007/BF02522214
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02522214