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Shock compression of Fe‐FeS mixture up to 204 GPa
Author(s) -
Huang Haijun,
Wu Shijie,
Hu Xiaojun,
Wang Qingsong,
Wang Xiang,
Fei Yingwei
Publication year - 2013
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/grl.50180
Subject(s) - adiabatic process , shock (circulatory) , sulfur , core (optical fiber) , compression (physics) , light gas gun , materials science , shock wave , thermodynamics , earth (classical element) , outer core , range (aeronautics) , analytical chemistry (journal) , physics , chemistry , metallurgy , composite material , medicine , mathematical physics , projectile , chromatography
Using a two‐stage light gas gun, we obtained new shock wave Hugoniot data for an iron‐sulfur alloy (Fe‐11.8wt%S) over the pressure range of 94–204 GPa. A least‐squares fit to the Hugoniot data yields a linear relationship between shock velocity D S and particle velocity u , D S (km/s) =3.60(0.14) +1.57(0.05) u . The measured Hugoniot data for Fe‐11.8wt%S agree well with the calculated results based on the thermodynamic parameters of Fe and FeS using the additive law. By comparing the calculated densities along the adiabatic core temperature with the PREM density profile, an iron core with 10 wt.% sulfur (S) provides the best solution for the composition of the Earth's outer core.