Apparently, the diffusion coefficient is delicate to impurities or structural concerns from the crystal, but That is still for being quantified. For our rough estimates of some time at temperature necessary to get rid of the hydrogen from our samples, the hydrogen diffusion coefficient selected is that provided by Belonoshko https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share