Tracer-Diffusion Coefficients of Cesium Ion in Aqueous Alkali Chloride Solutions at 25°

1959 ◽  
Vol 63 (12) ◽  
pp. 2068-2069 ◽  
Author(s):  
Reginald Mills ◽  
L. A. Woolf
Keyword(s):  
Diffusion Coefficients ◽  
Tracer Diffusion ◽  
Aqueous Alkali ◽  
Alkali Chloride ◽  
Chloride Solutions ◽  
Cesium Ion ◽  
Tracer Diffusion Coefficients

Tracer Diffusion of Iodide Ion in Aqueous Alkali Chloride Solutions at 25°

1957 ◽  
Vol 61 (12) ◽  
pp. 1634-1636 ◽  
Author(s):  
R. H. Stokes ◽  
L. A. Woolf ◽  
Reginald Mills
Keyword(s):  
Tracer Diffusion ◽  
Aqueous Alkali ◽  
Alkali Chloride ◽  
Chloride Solutions ◽  
Iodide Ion

Non-Stoichiometry and Cation Tracer Diffusion Studies in the Magnetite-UlvÖSpinel Solution, (Fe,Ti)3-δO4

1994 ◽  
Vol 369 ◽  
Author(s):  
Sanjeev Aggarwal ◽  
Rudiger Dieckmann
Keyword(s):  
Diffusion Coefficients ◽  
Tracer Diffusion ◽  
Oxygen Activity ◽  
Spinel Solid Solution ◽  
Low Oxygen ◽  
Cation Diffusion ◽  
Deviation From Stoichiometry ◽  
Diffusion Studies ◽  
Tracer Diffusion Coefficients ◽  
Point Defect Structure

AbstractCation diffusion in the spinel solid solution (Fe1-xTix)3-δO4 (0≤ x ≤ 0.3) was investigated at 1200 ºC as a function of oxygen activity, aO2 and cationic composition, x. At different cationic compositions, cation tracer diffusion coefficients, D*Me of Me = Fe and Ti were measured as a function of oxygen activity. Plots of log DMe vs. loga0 show V-shaped curves, indicating that different types of point defects prevail at high anc low oxygen activities. Thermogravimetric experiments were conducted, using a high resolution microbalance, to determine the deviation from stoichiometry in (Fe1-xTix)3-δO4 at 1200 °C. δversus log aO2 curves are S-shaped. An analysis of the oxygen activity dependences of thecation diffusion coefficients and the deviation from stoichiometry with regardto the point defect structure suggests that at high oxygen activities cation vacancies are the predominant defects governing the deviation from stoichiometry and the diffusion ofcations. At low oxygen activities, and at small values of x, cation interstitials determine the deviation from stoichiometry, while they dominate for 0 ≤ x ≤ 0.3 inthe cation diffusion.

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