Diffusion of hydrogen in (Mg,Fe)2SiO4 and high pressure polymorphs refined by the cBΩ model

► Hydrogen diffusion coefficients in Mg2SiO4 polymorphs have been reproduced. ► This calculation was made by means of the so-called cBΩ model. ► Our calculated Dcalc values agree fairly well with the experimental data. ► The cBΩ model also gives a correct estimation of the activation enthalpy.