Seemingly, the diffusion coefficient is sensitive to impurities or structural problems in the crystal, but that remains being quantified. For our rough estimates of enough time at temperature needed to eliminate the hydrogen from our samples, the hydrogen diffusion coefficient chosen is the fact that specified by Belonoshko et al. https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share