The Electrical Conductivity of Molten (Ag, Cd1/2)Br

The electrical conductivity of molten (Ag, Cd1/2)Br has been determined as a function of temperature in the whole range of compositions. The resulting activation energy values and the conductivity isotherm at 850 K are compared with those of the system (Ag, Cd1/2)Cl.

The Effect of Pressure on the Electrical Conductivity of the Molten Halides of Mercury and the Molten Iodides of Cadmium, Gallium and Indium

The electrical conductivities of molten HgCl2, HgBr2, Hgl2, Cdl2, Gal3 and InI3 were measured to pressures of 1 GPa (10 kbar), using a heated pressure vessel pressurised with argon. Additionally, the conductivities of CdI2 and HgCl2 were measured from 2 to 6 GPa, using a tetrahedral anvil apparatus. In every case the conductivity rose with pressure initially, and this is thought to be due to an increase in the degree of self-ionisation of the liquid. For CdI2 and Hgl2 a maximum was observed in the conductivity isotherm below 1 GPa, and for HgCl2 the conductivity fell with pressure from 2 to 6 GPa, implying that a maximum exists between 1 and 2 GPa. At the maximum the degree of ionisation approaches unity, and there is a balance between the competing effects of pressure in increasing the degree of ionisation and in reducing the ionic mobilities.

The Effect of the Anion Polarization on the Cationic Mobilities in Nitrate Binary Mixtures

The electrical perturbation induced by the simultaneous presence of two different cations near the anion (which is the frame of reference) is indicated as main factor influencing the internal mobilities in dilute solutions of monovalent nitrates in NaNO3 .By extending the mobility isotherm derived on the basis of the previous assumptions to a larger concentration range, an equivalent conductivity isotherm is proposed.

The Electrical Conductivity of (Tl-Rb)NO3 and (Na-Rb)NO3

The electrical conductivity of molten (Na—Rb)NO3 and (Tl—Rb)NO3 was determined.While the equivalent conductivity of the first system shows the usual negative deviation from additivity, that of the second one varies nearly linearly with composition.After discussing the conductivity isotherms in terms of some proposed models, an excess conductivity isotherm is presented, derived on the basis of simple assumptions about the trend of both cationic mobilities.