Where can I find the diffusion coefficients of K, Ca, Fe and Ti in TiO2, Fe2O3 and mixed Fe-Ti-oxides?

I am interested mostly in the diffusion coefficients of K and Ca in Fe and Ti-oxides, but also for the interdiffusion coefficients of Fe and Ti.  Any help with resources or ways to calculate them...

14 September 2016 1,646 3 View