Seemingly, the diffusion coefficient is sensitive to impurities or structural troubles inside the crystal, but that remains to get quantified. For our tough estimates of time at temperature needed to eliminate the hydrogen from our samples, the hydrogen diffusion coefficient picked out is always that given by Belonoshko et al. https://tbookmark.com/story17992766/5-essential-elements-for-buy-sri-lanka-pukhraj-in-india