OXYGEN DIFFUSION IN FORSTERITE.

Abstract

Oxygen self-diffusion coefficients for forsterite single crystals were determined in different orientations by the single-spectrum proton activation technique. In the temperature range 1275 degree - 1625 degree C the diffusion coefficients in b direction can be represented by D//b equals 3. 5 multiplied by 10** minus **3 exp left bracket ( minus 89 plus or minus 3 kcal/mol)/RT right bracket cm**2/s. right bracket