The conductivity of the molten material was determined by using alternating-current bridge techniques and sealed capillary-type cells. The conductivity, at temperatures ranging from 502 to 594K, could be described by:

σT (S/cm) = 2667 exp[-0.18(eV)/kT]

A.Wojakowska, E.Kundys: Journal of Materials Science, 1990, 25[8], 3780-4