Grain structure of the Earth's inner core     

Lucile Venet  Thierry Duffar  Renaud Deguen 《Comptes Rendus Geoscience》2009,341(7):513-516

The coarsening rate of an initial grain structure is calculated and compared to the inner core growth rate. An estimate of the present size of the grains in the centre of the core varies from 560 m to 12 km, depending on the value taken for the diffusion coefficient of iron in the core. Regardless of the hypotheses chosen, this size is homogeneous inside the inner core.  相似文献