Conductivity values, as a function of temperature and I pressure, were estimated in compact and adherent iodide films which were grown on pure Pb. The data were deduced from isothermal parabolic rate constants during tarnishing studies under short-circuit conditions. The iodide films were grown within a special reactor, using temperatures of 423 to 523K and I pressure of 0.615 to 6.578kPa. The estimated ionic conductivities were found to obey a cube-root dependence on the pressure. This was associated with an activation energy of 51kJ/mol.

S.C.Kuiry, S.K.Roy, S.K.Bose: Materials Research Bulletin, 1999, 34[10-11], 1643-50