By using chronopotentiometric measurements, the diffusivity of ThIV ions in the melt at temperatures ranging from 1000 to 1200K was shown to be described by:

log[D (cm2/s)] = -1.9221 – 2978/T

with a value of 2.34 x 10-5cm2/s at 1100K. V.E.Komarov, N.P.Borodina, V.Y.Kudyakov, Y.V.Posokhin: Elektrokhimiya, 1974, 10[10], 1599-601