Evidently, the diffusion coefficient is delicate to impurities or structural troubles inside the crystal, but That is still being quantified. For our tough estimates of enough time at temperature needed to clear away the hydrogen from our samples, the hydrogen diffusion coefficient selected is that supplied by Belonoshko et al. https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share