Grain structure of the Earth's inner core |
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| Authors: | Lucile Venet Thierry Duffar Renaud Deguen |
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| Institution: | aSIMAP-EPM, BP 75, 38402 Saint-Martin d’Hères, France;bLGIT, maison des géosciences, 1381, rue de la Piscine, 38402 Saint-Martin d’Hères, France |
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| Abstract: | 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. |
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| Keywords: | Earth's core Grain structure Single crystal Grain coarseningMots clé s: Graine terrestre Structure de grain Monocristal Grossissement de grains |
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