Atomic diffusion coefficients calculated for transition metals in olivine

Details Atomic diffusion coefficients calculated for transition metals in olivine Atomic diffusion coefficients calculated for transition metals in olivine

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983natur.303..602m&link_type=abstract

Nature (ISSN 0028-0836), vol. 303, June 16, 1983, p. 602, 603.

Mathematics

Logic

12

Diffusion Coefficient, Ionic Diffusion, Mineralogy, Olivine, Petrology, Transition Metals, Forsterite, Magnesium

Scientific paper

Atomic diffusion coefficients are estimated for four transition metals in the forsterite structure, on the basis of a potential energy map that employs the Born-Mayer repulsive energy term in the WMIN computer program of Busing (1981). Estimates are presented for the activation energies of M1 cation migration on the basis of the height of the saddle point at the pass, and the frequency terms for diffusion are derived from the shape of the energy minimum around the M1 site. Agreement with experimental results is noted, and it is suggested that although the atomic diffusion coefficients in geologically important minerals such as pyroxene are often too slow to measure experimentally, the present method may be applied to such minerals in order to derive genesis and cooling history data.

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