Evidently, the diffusion coefficient is delicate to impurities or structural difficulties from the crystal, but that remains to be quantified. For our rough estimates of enough time at temperature required to take out the hydrogen from our samples, the hydrogen diffusion coefficient preferred is offered by Belonoshko et al. (2004), https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share