Diffusion of transition metals in periclase by experiment and first-principles, with implications for core-mantle equilibration during metal percolation
作者： Katherine L. Crispin , Saumitra Saha , Dane Morgan , James A. Van Orman
DOI: 10.1016/J.EPSL.2012.09.023
关键词: Geology 、 Doping 、 Core formation 、 Vacancy defect 、 Metal 、 Transition metal 、 Mineralogy 、 Thermodynamics 、 Periclase 、 Mantle (geology)
摘要: Diffusion of the divalent transition metals in deep mantle is important for understanding length scales heterogeneity, transport across core–mantle boundary, and degree equilibration during core formation. Here we report results experiments theoretical calculations on Ni, Co, Fe Mn diffusion periclase, primary repository these elements Earth’s lower mantle. The periclase used was doped with 550 ppm Al 3 þ to fix cation vacancy concentration, were performed at 2 GPa temperatures between 1673 2073 K. variation coefficients among ��
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