CORRELATION OF THE CATIONIC CHARGE OF TRANSPORT WITH THE NONSTOICHIOMETRY AND THE OXYGEN EXPONENTS IN CO1-DELTA-O

An attempt has first been made to correlate the cationic charge of tra nsport (alpha(1)) with the nonstoichiometry (delta) as well as with t he reciprocal oxygen exponents of the conductivity and the nonstoichio metry for the system Co1-deltaO. The cationic charge of transport tend s to increase monotonically, but at a lesser and lesser rate, with del ta at a given temperature and appears to be linearly correlated with r eciprocal oxygen exponents. These correlations suggest that the charge of transport may be viewed as a measure of the relaxation effect betw een the surrounding electronic charge cloud and the central cation vac ancy (V-Co'') or as the number of holes associated with the vacancy in an average sense which reduces the effective charge of the vacancy.