Abstract
The density of ErF3 was measured with a gamma densimeter at temperatures from below the α–β phase transition to above the melting point. The density and volume expansivity of liquid ErF3 just above the melting point were found to be 6092 ± 30 kg/m3 and (15.1 ± 0.5) × 10–5 K–1. The relative changes in density accompanying the melting and polymorphic transformation of ErF3 are 0.75 ± 0.1 and 16.9 ± 1.3%, respectively. The results, together with earlier data, were used to reveal general trends in the variation of thermal properties across the ErF3 to LuF3 series.
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REFERENCES
Thoma, R.E. and Brunton, G.D., Equilibrium Dimorphism of the Lanthanide Trifluorides, Inorg. Chem., 1966, vol. 5, no. 11, pp. 1937–1939.
Garashina, L.S., Sobolev, B.P., Aleksandrov, V.B., and Vishnyakov, Yu.S., Crystal Chemistry of Rare-Earth Fluorides, Kristallografiya, 1980, vol. 25, no. 2, pp. 294–299.
Stankus, S.V., Khairulin, R.A., and Tyagel'sky, P.V., Density Changes of Ytterbium Trifluoride on Phase Transitions, J. Alloys Compd., 1997, vol. 257, pp. 62–64.
Khairulin, R.A., Stankus, S.V., and Tyagel'sky, P.V., Thermal Properties of Lutetium Trifluoride at High Temperatures, High Temp.-High Pressures, 1998, vol. 30, no. 4, pp. 479–482.
Stankus, S.V., Khairulin, R.A., and Tyagel'sky, P.V., Thermal Properties of Distilled Yttrium Fluoride near the Melting Point, Teplofiz. Vys. Temp., 1997, vol. 35, no. 6, pp. 999–1001.
Khairulin, R.A., Stankus, S.V., and Tyagel'sky, P.V., Thermal Expansion of Liquid and Solid DyF3, Neorg. Mater., 1998, vol. 34, no. 7, pp. 888–892 [Inorg. Mater. (Engl. Transl.), vol. 34, no. 7, pp. 742-745].
Khairulin, R.A., Stankus, S.V., and Lyapunov, K.M., Thermal Properties of Holmium Trifluoride at High Temperatures, Teplofiz. Vys. Temp., 2000, vol. 38, no. 1, pp. 154–156.
O'Keefe, M., Ionic Conductivity of Yttrium Fluoride and Lutetium Fluoride, Science (Washington, D. C., 1883), 1973, vol. 180, no. 4092, pp. 1276–1277.
Stankus, S.V. and Khairulin, R.A., Thermal Properties of Platinum from 293 to 2300 K: Studies by the Penetrating Radiation Technique, Teplofiz. Vys. Temp., 1992, vol. 30, no. 3, pp. 487–494.
Stankus, S.V., Khairulin, R.A., and Tyagel'sky, P.V., Density Changes during Melting of LiF, YF3, and LiYF4, Neorg. Mater., 1996, vol. 32, no. 2, pp. 234–237 [Inorg. Mater. (Engl. Transl.), vol. 32, no. 2, pp. 212-214].
Spedding, F.H., Beaudry, B.J., Henderson, D.C., and Moorman, J., High Temperature Enthalpies and Related Thermodynamic Functions of the Trifluorides of Sc, Ce, Sm, Eu, Gd, Tb, Dy, Er, Tm, and Yb, J. Chem. Phys., 1974, vol. 60, pp. 1578–1588.
Sobolev, B.P., Garashina, L.S., Fedorov, P.P., et al., Polymorphism and Crystallography of Lanthanide and Yttrium Trifluorides, Kristallografiya, 1973, vol. 18, no. 4, pp. 751–758.
Shannon, R.D., Revised Ionic Radii and Systematic Studies of Interatomic Distances in Halides and Chalcogenides, Acta Crystallogr., Sect. A: Cryst. Phys., Diffr., Theor. Gen. Crystallogr., 1976, vol. 32, no. 5, pp. 751-767.
Stankus, S.V., Khairulin, R.A., and Tyagel'sky, P.V., Thermal Properties of Rare Earth Fluorides in Solid and Liquid States, High Temp.-High Pressures, 1995/1996, vol. 27/28, no. 5, pp. 493–498.
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Khairulin, R.A., Stankus, S.V. & Lyapunov, K.M. Phase Transformations and Thermal Properties of Erbium Trifluoride at High Temperatures. Inorganic Materials 36, 1289–1292 (2000). https://doi.org/10.1023/A:1026654303585
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DOI: https://doi.org/10.1023/A:1026654303585