Auxiliary Material for
Thermodynamics of melting relations in the system Fe-FeO:
implications for the oxygen content in the Earth’s outer core.
Tetsuya Komabayashi
(Department of Earth and Planetary Sciences, Tokyo Institute of Technology, Tokyo,
Present address: School of GeoSciences and Centre for Science at Extreme Conditions,
University of Edinburgh, Edinburgh)
Journal of Geophysical Research, Solid Earth, 2014
Introduction
This data set contains calculated eutectic relations at 15 GPa and physical properties of
the end-member phases of Fe and FeO from the thermodynamic database constructed in
this study. The calculated eutectic relations are given in the figure “fs01.pdf”. The
physical property data are given in the table “ts01.docx”. Physical properties include the
molar volume, V; thermal expansivity, ; isothermal bulk modulus, KT; entropy, S; and
Grüneisen parameter, γ. The Grüneisen parameter is given by
γ = VKT /Cv
where Cv is the heat capacity at a constant volume.
1. fs01.pdf Calculated eutectic relations at 15 GPa (a) with Fe melting temperature
lower than FeO melting temperature and (b) with FeO melting temperature lower
than Fe melting temperature. (a) The phase relation is from Figure 3a in the main
text. The assemblage FeO + metallic liquid is stabilized above the solidus, which is
consistent with the experiments [Tsuno et al., 2007]. See the caption of Figure 3a for
the symbols. (b) The phase relation was calculated with the assumption that Fe
melting temperature is greater than FeO melting temperature. The melting
temperatures were from Anzellini et al. [2013] and Fischer and Campbell [2010] for
Fe and FeO, respectively. The calculation stabilizes the assemblage Fe + ionic liquid
above the solidus, which was not observed in the experiments.
2. ts01.docx Physical properties of the end-member phases of Fe and FeO.