Seemingly, the diffusion coefficient is delicate to impurities or structural problems during the crystal, but That is still to be quantified. For our rough estimates of some time at temperature necessary to take out the hydrogen from our samples, the hydrogen diffusion coefficient picked is presented by Belonoshko et al. https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share