Pressure-induced coordination changes of transition-metal ions in silicate melts

Details Pressure-induced coordination changes of transition-metal ions in silicate melts Pressure-induced coordination changes of transition-metal ions in silicate melts

Jul 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993natur.364...54k&link_type=abstract

Nature (ISSN 0028-0836), vol. 364, no. 6432, p. 54-56.

Physics

21

Earth Mantle, Liquid Phases, Metal Ions, Pressure Effects, Silicates, Transition Metals, Cobalt, Fractionation, Melting, Nickel

Scientific paper

Crystal-field spectra are presented for doped silicate glasses quenched from high pressure/high temperature melts; these indicate that the coordination of cobalt and nickel ions in silicate melts changes at high pressures. The results obtained suggest that the partitioning of these species into the melt phase is greatly enhanced with rising pressure. The crystal/melt and metal/melt transition coefficients are reduced by over an order of magnitude at lower-mantle conditions.

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