Evidently, the diffusion coefficient is delicate to impurities or structural troubles from the crystal, but That is still to become quantified. For our tough estimates of time at temperature needed to take out the hydrogen from our samples, the hydrogen diffusion coefficient decided on is always that given by Belonoshko https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share