The rotating disk method was used to study the dissolution of Fe3+ in the melt (table 63). The data, for temperatures ranging from 1123 to 1213K, could be described by: D (cm2/s) = 0.21 exp[-18.83(kcal/mol)/RT]

The diffusion coefficients agreed with those obtained by applying the Stokes-Einstein relationship, when an empirical correction was made for the electrostatic interaction of ions.

Diffusion Coefficients of Fe3+ Ions in Chloride Melts. A.B.Bezukladnikov, V.A.Bezvoritnii: Izvestiya Akademii Nauk SSSR – Metal., 1971, 1, 64-9

Table 64

Diffusion of HCl in KCl Melts