Title: Study of the defect structure of ''pure'' and doped nonstoichiometric CeO$sub 2$. Progress report, January 1, 1974--December 31, 1974
Abstract: results of similar measurements on CeO/sub 2/ doped with other oxides (e.g., ThO/sub 2/, Ta/sub 2/O/sub 5/, etc.) which have cations with different valences and ionic radii are also discussed. The primary objective of these studies was to determine the effect of ionic radii, valence and concentration of the dopant cation on (1) the nonstoichiometric behavior, (2) the thermodynamic quantities ..delta..antiH/sub O/sub 2// and ..delta..antiS/sub O/sub 2//, (3) the nonstoichiometric defect structure, (4) the electronic and ionic conductivities, and (5) the mobility of electrons and oxygen vacancies in doped CeO/sub 2//sub -x/.