Seemingly, the diffusion coefficient is delicate to impurities or structural issues in the crystal, but That is still for being quantified. For our tough estimates of some time at temperature necessary to get rid of the hydrogen from our samples, the hydrogen diffusion coefficient selected is that supplied by Belonoshko https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share