Self-diffusion of fluorine in molten LiBeF3

The self-diffusion coefficients of fluorine in molten LiBeF3 have been measured with the capillary reservoir technique using 18F as tracer prepared in Japan Research Reactor-3. The result showed significantly large self-diffusion coefficient in spite of the large activation energy. This phenomena can be proved from the movement of fluoroberyllate anions, the exchange of fluorine ion with the neighbouring anions, and ion-pair diffusion. (auth.)