COMPLEXATION AND TRANSPORT-PROPERTIES IN BINARY GLASS-FORMING MOLTEN CHLORIDE SYSTEMS

Following a recent study of the contrasting effects of FeCl//4** minus versus CrCl//6**3** minus complex anion formation on the transport properties of solutions containing them, we report a study of the intermediate cases of MCl//4**2** minus complex formation (M equals Co**2**30 , Ni**2** plus , and Cd**2** plus ). In these cases an intermediate and unspectacular response is observed, and secondary factors intercede to produce an apparent contradiction between composition-dependent behavior close to, and far from, the glass transition. The contradictions are resolved by recognizing that, in these intermediate cases, the predominant effect of complexation is to produce a decrease in liquid 'fragility'.