Kobayashi, H;
Kamimura, T;
Alfe, D;
Sturhahn, W;
Zhao, JY;
Alp, EE;
(2004)
Phonon density of states and compression behavior in iron sulfide under pressure.
PHYS REV LETT
, 93
(19)
, Article 195503. 10.1103/PhysRevLett.93.195503.
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Abstract
We report the partial phonon densities of states (DOS) of iron sulfide, a possible component of the rocky planet's core, measured by the Fe-57 nuclear resonant inelastic x-ray scattering and calculate the total phonon DOS under pressure. From the phonon DOS, we drive thermodynamic parameters. A comparison of the observed and estimated compressibilities makes it clear that there is a large pure electronic contribution in the observed compressibility in the metallic state. Our results present the observation of thermodynamic parameters of iron sulfide with the low-spin state of an Fe2+ ion at the high density, which is similar to the condition of the Martian core.
| Type: | Article |
|---|---|
| Title: | Phonon density of states and compression behavior in iron sulfide under pressure |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.93.195503 |
| Publisher version: | http://dx.doi.org/10.1103/PhysRevLett.93.195503 |
| Language: | English |
| Additional information: | © 2004 The American Physical Society |
| Keywords: | NUCLEAR RESONANT SCATTERING, TRANSITION-METAL COMPOUNDS, SYNCHROTRON-RADIATION, ELECTRONIC-STRUCTURE, HIGH-TEMPERATURE, BAND-GAPS, FES, SPIN, SPECTROSCOPY, MARS |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences |
| URI: | https://discovery.ucl.ac.uk/id/eprint/54371 |
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