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