Self‐Diffusion Coefficient of Oxygen in Single‐Crystal Forsterite

Abstract

Self‐diffusion coefficients of the oxygen ion in single‐crystal forsterite were determined by the gas‐solid isotope exchange technique. The results in the 1472° to 1734°C range were described by D =2.85 (10 −2 exp (−416 kJ/mol/RT)cm 2 /s. In preparing the diffusion sample, argon‐ion milling gave a less defective surface condition than did chemical polishing.