Apparently, the diffusion coefficient is delicate to impurities or structural concerns from the crystal, but That is still for being quantified. For our tough estimates of time at temperature needed to clear away the hydrogen from our samples, the hydrogen diffusion coefficient chosen is presented by Belonoshko et al. (2004), https://www.tumblr.com/thegemjournal/759696203354128384/understanding-the-unique-characteristics-of-yellow?source=share