Computer Science
Scientific paper
Dec 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983gecoa..47.2275m&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 47, Issue 12, pp.2275-2279
Computer Science
2
Scientific paper
The diffusion coefficients of divalent cations, Ni, Co, Mn, Ca, Sr and Ba in Mn-olivine, Mn 2 SiO 4 , were determined experimentally by the use of 63 Ni, 60 Co, 54 Mn, 45 Ca, 85 Sr and 133 Ba radioactive tracers, respectively. The empirical relationship between the diffusion coefficient and ionic size of diffusional species shows a trend of variation which was similar to that observed in Mg-olivine, Mg 2 SiO 4 . The similarity in the trend of variation of diffusion in various olivine systems strongly suggests that the trend is characteristic to the crystal structure of olivine. However, the diffusion coefficient of each cation in Mn-olivine was higher than that in Mg-olivine by about two orders of magnitude. It is suggested that this is due to the loose structure of Mn-olivine compared with that of Mg-olivine.
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