Refractive indexes of molten LaBr3 measured by goniometry

Refractive indexes of molten LaBr3 were measured with the lights at 6 wavelengths by goniometry. The refractive indexes were represented by empirical equations as polynomial functions of temperature and wavelength. The molar refractivities were calculated from the data of refractive indexes and molar volumes. The electronic polarizabilities of molten LaBr3 were estimated at 14.14 x 10(-30) m(3) by use of the Clausius-Mosotti equation.