Refractive Index of Molten LaCl₃-KCl, LaCl₃-NaCl, and LaCl₃-CaCl₂ Mixtures

Abstract

The refractive indexes of molten LaCl3-KCl, LaCl3-NaCl, and LaCl3-CaCl2 mixtures were measured goniometrically for nine wavelengths and represented by empirical formulas as func tions of both temperature and wavelength. According to the obtained formulas and the molar volume data, the molar refractivities and the electronic polarizabilities were estimated.

Surface Tensions of Molten Binary CaCl2-NaCl, LaCl3-NaCl, and LaCl3-CaCl2 and Ternary LaCl3-CaCI2-NaCl Systems

“…30 mol% LaCl3. Such a behavior is similar to that found in the composition dependence of surface tension for the molten LaCl3-KCl system [5],…”

“…LaCl3 was prepared and purified in the same way as reported in [5]. Impurities in the purified LaCl3…”

“…As in [5], the surface tension of molten LaCl3 could be expressed as y = 147.90 -0.0423 t , t/°C . Figure 1 shows the surface tensions reported in the literature with those obtained in this work for molten NaCl and CaCl2.…”

Molar Volume of Molten Binary CaCl2-NaCl, LaCl3-NaCl, and LaCl3-CaCl2 and Ternary LaCl3-CaCl2-NaCl Systems

“…LaCl 3 was prepared and purified in the same way as reported in [9], Impurities in the purified LaCl 3 crystal were determined by emission spectrochemical analysis (cf. Table 1).…”

“…These data have been used to determine the molar refractivities [9] and the surface tensions [10] of these melts. * Function Materials Laboratory, Department of Fuels and Materials Research, Japan Atomic Energy Research Institute, Tokai-mura.…”