Chemical methods for the determination of the “oxidizing (or reducing) power” of certain materials containing a multivalent element in several oxidation states

Order–Disorder Enhanced Oxygen Conductivity and Electron Transport in Ruddlesden–Popper Ferrite-Titanate Sr3Fe2−xTixO6+δ

“…3b). The oxygen content of the as-prepared specimen was found to be equal to 6 Figure 3b demonstrates that the total amount of oxygen, which can reversibly be removed from the oxide, is close to 0.24. The XRD pattern of the sample fired at 6501C in the atmosphere 5% H 2 :95% He did not reveal impurity phases.…”

“…When necessary, quenching was performed by dropping samples into a crucible with liquid gallium that rested in the lower end of the tubular compartment at room temperature. The independent determination of oxygen content in asprepared samples was carried out using iodometric titration as described previously (6). Powders of Sr 3 Fe 2 O 6+d and Sr 3 Fe 0.8 Ti 1.2 O 6+d were pressed into disks under 2 kbar uniaxial load.…”

Synthesis, sintering, and thermoelectric properties of the solid solution La1–xSr x CoO3±δ (0 ≤ x ≤ 1)

“…The lattice parameters were refined by the Rietveld method using the Fullprof software [42]. Oxygen content in La 1-x Sr x CoO 3 samples was determined by iodometric titration [43,44].…”

Computer Simulations of Thermal Expansion in Lanthanum-Based Perovskites

“…Room temperature oxygen stoichiometries of calcined powder specimens were determined by iodometric titration using a modi"ed version of Nadalin and Brozda's oxidizing power method No. 3 (8). The results were "0.0, 0.03, and 0.04 for LSCF6428, LSCF4628, and LSCF2828, respectively.…”