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Mao HK, Xu J, Struzhkin VV, et al. Phonon density of states of iron up to 153 gigapascals. Science. 2001;292(5518):914-6doi: 10.1126/science.1057670.
Mao, H. K., Xu, J., Struzhkin, V. V., Shu, J., Hemley, R. J., Sturhahn, W., Hu, M. Y., Alp, E. E., Vocadlo, L., Alfè, D., Price, G. D., Gillan, M. J., Schwoerer-Böhning, M., Häusermann, D., Eng, P., Shen, G., Giefers, H., Lübbers, R., & Wortmann, G. (2001). Phonon density of states of iron up to 153 gigapascals. Science (New York, N.Y.), 292(5518), 914-6. https://doi.org/10.1126/science.1057670
Mao, H K, et al. "Phonon density of states of iron up to 153 gigapascals." Science (New York, N.Y.) vol. 292,5518 (2001): 914-6. doi: https://doi.org/10.1126/science.1057670
Mao HK, Xu J, Struzhkin VV, Shu J, Hemley RJ, Sturhahn W, Hu MY, Alp EE, Vocadlo L, Alfè D, Price GD, Gillan MJ, Schwoerer-Böhning M, Häusermann D, Eng P, Shen G, Giefers H, Lübbers R, Wortmann G. Phonon density of states of iron up to 153 gigapascals. Science. 2001 May 04;292(5518):914-6. doi: 10.1126/science.1057670. PMID: 11340201.
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Science. 2001 May 04;292(5518):914-6. doi: 10.1126/science.1057670.

Phonon density of states of iron up to 153 gigapascals.

Science (New York, N.Y.)

H K Mao, J Xu, V V Struzhkin, J Shu, R J Hemley, W Sturhahn, M Y Hu, E E Alp, L Vocadlo, D Alfè, G D Price, M J Gillan, M Schwoerer-Böhning, D Häusermann, P Eng, G Shen, H Giefers, R Lübbers, G Wortmann

Affiliations

  1. Geophysical Laboratory and Center for High Pressure Research, Carnegie Institution of Washington, Washington, DC 20015, USA.

PMID: 11340201 DOI: 10.1126/science.1057670

Abstract

We report phonon densities of states (DOS) of iron measured by nuclear resonant inelastic x-ray scattering to 153 gigapascals and calculated from ab initio theory. Qualitatively, they are in agreement, but the theory predicts density at higher energies. From the DOS, we derive elastic and thermodynamic parameters of iron, including shear modulus, compressional and shear velocities, heat capacity, entropy, kinetic energy, zero-point energy, and Debye temperature. In comparison to the compressional and shear velocities from the preliminary reference Earth model (PREM) seismic model, our results suggest that Earth's inner core has a mean atomic number equal to or higher than pure iron, which is consistent with an iron-nickel alloy.

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