OXYGEN DIFFUSION AND DIFFUSION VISCOSITY OF SOME SILICATES

Abstract

Considered is the problem of diffusion viscosity η determination for minerals (or rocks) with ideal crystalline structure. The calculation is conducted according to the formula: η=(0.05T/D)exp(E/RT), where T - temperature, D - diffusion coefficient, E - activation energy of diffusion. Using the least squares method the following analytical dependences are obtained: lnD=-35.88+0.22E, lnη=6.12+1.06E. The calculated activation energy values are equal to experimental ones within the error range. The diffusive mobility and viscous flow processes, as concluded, obey the compensation law, that allows estimating their parameters using calculation methods and, correspondingly, allows describing the deep-proceeding processes poorly adjustable for experimental modeling.