High pressure thermoelasticity and sound velocities of Fe-Ni-Si alloys
Abstract
The Earth's iron-dominant core is known to contain nickel from cosmochemical analysis and some amount of light elements from geophysical constraints on density and seismic wave velocities. Although there have been several studies to constrain thermoelastic properties of iron-alloys, there has been no systematic study on the effects of nickel and light elements on properties of iron using the same experimental methods and data analysis approach. We conducted nuclear resonant inelastic X-ray scattering and X-ray diffraction experiments on body-centered cubic and hexagonal close-packed (hcp) Fe0.91Ni0.09 and Fe0.8Ni0.1Si0.1 up to 104 GPa and 86 GPa, respectively, and compare to similar measurements conducted on hcp-Fe up to 171 GPa. Specifically, we determine the Debye sound velocity from the low-energy transfer region of the (partial) phonon density of states (DOS) using the equation of state determined for each material and a new approach which utilizes information criteria and probability distributions. Nickel decreases the shear velocity of iron, while 10 at% Si has little to no effect on the shear velocity of Fe0.91Ni0.09. We observe that the shape of the phonon DOS of these alloys remains similar with increasing pressure. In the measured compression range, we therefore apply a generalized scaling law to describemore »
- Authors:
-
[1];
- California Inst. of Technology (CalTech), La Canada Flintridge, CA (United States). Seismological Lab.; Exxon Mobil, Spring, TX (United States)
- California Inst. of Technology (CalTech), La Canada Flintridge, CA (United States). Seismological Lab.
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Publication Date:
- Research Org.:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- National Science Foundation (NSF); W.M. Keck Foundation, Los Angeles, CA (United States); USDOE Office of Science (SC)
- OSTI Identifier:
- 1559451
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of the Earth and Planetary Interiors
- Additional Journal Information:
- Journal Volume: 294; Journal Issue: C; Journal ID: ISSN 0031-9201
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Earth’s core; Grüneisen parameter; high pressure; nuclear resonant inelastic x-ray spectroscopy; sound velocity
Citation Formats
Morrison, Rachel A., Jackson, Jennifer M., Sturhahn, Wolfgang, Zhao, Jiyong, and Toellner, Thomas S. High pressure thermoelasticity and sound velocities of Fe-Ni-Si alloys. United States: N. p., 2019.
Web. doi:10.1016/j.pepi.2019.05.011.
Morrison, Rachel A., Jackson, Jennifer M., Sturhahn, Wolfgang, Zhao, Jiyong, & Toellner, Thomas S. High pressure thermoelasticity and sound velocities of Fe-Ni-Si alloys. United States. https://doi.org/10.1016/j.pepi.2019.05.011
Morrison, Rachel A., Jackson, Jennifer M., Sturhahn, Wolfgang, Zhao, Jiyong, and Toellner, Thomas S. Sun .
"High pressure thermoelasticity and sound velocities of Fe-Ni-Si alloys". United States. https://doi.org/10.1016/j.pepi.2019.05.011. https://www.osti.gov/servlets/purl/1559451.
@article{osti_1559451,
title = {High pressure thermoelasticity and sound velocities of Fe-Ni-Si alloys},
author = {Morrison, Rachel A. and Jackson, Jennifer M. and Sturhahn, Wolfgang and Zhao, Jiyong and Toellner, Thomas S.},
abstractNote = {The Earth's iron-dominant core is known to contain nickel from cosmochemical analysis and some amount of light elements from geophysical constraints on density and seismic wave velocities. Although there have been several studies to constrain thermoelastic properties of iron-alloys, there has been no systematic study on the effects of nickel and light elements on properties of iron using the same experimental methods and data analysis approach. We conducted nuclear resonant inelastic X-ray scattering and X-ray diffraction experiments on body-centered cubic and hexagonal close-packed (hcp) Fe0.91Ni0.09 and Fe0.8Ni0.1Si0.1 up to 104 GPa and 86 GPa, respectively, and compare to similar measurements conducted on hcp-Fe up to 171 GPa. Specifically, we determine the Debye sound velocity from the low-energy transfer region of the (partial) phonon density of states (DOS) using the equation of state determined for each material and a new approach which utilizes information criteria and probability distributions. Nickel decreases the shear velocity of iron, while 10 at% Si has little to no effect on the shear velocity of Fe0.91Ni0.09. We observe that the shape of the phonon DOS of these alloys remains similar with increasing pressure. In the measured compression range, we therefore apply a generalized scaling law to describe the volume dependence of the phonon DOS and find that the vibrational Grüneisen parameters of hcp-Fe0.91Ni0.09 are nearly indistinguishable from those hcp-Fe and those for Fe0.8Ni0.1Si0.1 trend lower. From the vibrational free energy, we constrain the harmonic vibrational component of thermal pressure, which shows a significant positive deviation from theoretical calculations of hcp-Fe at pressures and temperatures of Earth's core. Collectively, our results demonstrate that the effects of nickel should be considered when modeling iron-rich planetary cores.},
doi = {10.1016/j.pepi.2019.05.011},
journal = {Physics of the Earth and Planetary Interiors},
number = C,
volume = 294,
place = {United States},
year = {Sun Sep 01 00:00:00 EDT 2019},
month = {Sun Sep 01 00:00:00 EDT 2019}
}
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Works referenced in this record:
Composition and temperature of the Earth’s core constrained by combining ab initio calculations and seismic data
journal, January 2002
- Alfè, D.; Gillan, M. J.; Price, G. D.
- Earth and Planetary Science Letters, Vol. 195, Issue 1-2
Temperature and composition of the Earth's core
journal, March 2007
- Alfè, D.; Gillan, M. J.; Price, G. D.
- Contemporary Physics, Vol. 48, Issue 2
The chemical composition of the Earth
journal, September 1995
- Allègre, Claude J.; Poirier, Jean-Paul; Humler, Eric
- Earth and Planetary Science Letters, Vol. 134, Issue 3-4
Elastic anisotropy in textured hcp-iron to 112 GPa from sound wave propagation measurements
journal, August 2004
- Antonangeli, Daniele; Occelli, Florent; Requardt, Herwig
- Earth and Planetary Science Letters, Vol. 225, Issue 1-2
Composition of the Earth's inner core from high-pressure sound velocity measurements in Fe–Ni–Si alloys
journal, June 2010
- Antonangeli, Daniele; Siebert, Julien; Badro, James
- Earth and Planetary Science Letters, Vol. 295, Issue 1-2
Sound velocities and density measurements of solid hcp-Fe and hcp-Fe–Si (9 wt.%) alloy at high pressure: Constraints on the Si abundance in the Earth's inner core
journal, January 2018
- Antonangeli, Daniele; Morard, Guillaume; Paolasini, Luigi
- Earth and Planetary Science Letters, Vol. 482
Static compression of Fe0.83Ni0.09Si0.08 alloy to 374GPa and Fe0.93Si0.07 alloy to 252GPa: Implications for the Earth's inner core
journal, October 2011
- Asanuma, Hidetoshi; Ohtani, Eiji; Sakai, Takeshi
- Earth and Planetary Science Letters, Vol. 310, Issue 1-2
Effect of light elements on the sound velocities in solid iron: Implications for the composition of Earth's core
journal, February 2007
- Badro, James; Fiquet, Guillaume; Guyot, François
- Earth and Planetary Science Letters, Vol. 254, Issue 1-2
Melting, density, and anisotropy of iron at core conditions: new x-ray measurements to 150 GPa
journal, July 2008
- Boehler, R.; Santamaría-Pérez, D.; Errandonea, D.
- Journal of Physics: Conference Series, Vol. 121, Issue 2
Ab initio equation of state of iron up to 1500 GPa
journal, March 2013
- Bouchet, J.; Mazevet, S.; Morard, G.
- Physical Review B, Vol. 87, Issue 9
Phase transitions, Grüneisen parameter, and elasticity for shocked iron between 77 GPa and 400 GPa
journal, June 1986
- Brown, J. Michael; McQueen, Robert G.
- Journal of Geophysical Research: Solid Earth, Vol. 91, Issue B7
Hidden carbon in Earth’s inner core revealed by shear softening in dense Fe 7 C 3
journal, December 2014
- Chen, Bin; Li, Zeyu; Zhang, Dongzhou
- Proceedings of the National Academy of Sciences, Vol. 111, Issue 50
Experimental constraints on the sound velocities of cementite Fe3C to core pressures
journal, July 2018
- Chen, Bin; Lai, Xiaojing; Li, Jie
- Earth and Planetary Science Letters, Vol. 494
Ab initio lattice dynamics calculations on the combined effect of temperature and silicon on the stability of different iron phases in the Earth's inner core
journal, January 2010
- Côté, Alexander S.; Vočadlo, Lidunka; Dobson, David P.
- Physics of the Earth and Planetary Interiors, Vol. 178, Issue 1-2
Ab initio simulations of iron–nickel alloys at Earth's core conditions
journal, September 2012
- Côté, Alexander S.; Vocˇadlo, Lidunka; Brodholt, John P.
- Earth and Planetary Science Letters, Vol. 345-348
Sound velocity of iron up to 152 GPa by picosecond acoustics in diamond anvil cell
journal, February 2014
- Decremps, F.; Antonangeli, D.; Gauthier, M.
- Geophysical Research Letters, Vol. 41, Issue 5
Normal mode constraints on shear and compressional wave velocity of the Earth's inner core
journal, April 2008
- Deuss, Arwen
- Earth and Planetary Science Letters, Vol. 268, Issue 3-4
Quasihydrostatic Equation of State of Iron above 2 Mbar
journal, November 2006
- Dewaele, Agnès; Loubeyre, Paul; Occelli, Florent
- Physical Review Letters, Vol. 97, Issue 21
Equations of state of Al, Au, Cu, Pt, Ta, and W and revised ruby pressure scale
journal, October 2006
- Dorogokupets, P. I.; Oganov, A. R.
- Doklady Earth Sciences, Vol. 410, Issue 1
High-pressure and high-temperature in situ X-ray diffraction study of iron and corundum to 68 GPa using an internally heated diamond anvil cell
journal, June 1998
- Dubrovinsky, Leonid S.; Saxena, Surendra K.; Lazor, Peter
- Physics and Chemistry of Minerals, Vol. 25, Issue 6
Gruneisen parameter of ε-iron up to 300 GPa from in-situ X-ray study
journal, February 2000
- Dubrovinsky, L. S.; Saxena, S. K.; Dubrovinskaia, N. A.
- American Mineralogist, Vol. 85, Issue 2
Preliminary reference Earth model
journal, June 1981
- Dziewonski, Adam M.; Anderson, Don L.
- Physics of the Earth and Planetary Interiors, Vol. 25, Issue 4
Configurational thermodynamics of Fe–Ni alloys at Earth's core conditions
journal, August 2011
- Ekholm, M.; Mikhaylushkin, A. S.; Simak, S. I.
- Earth and Planetary Science Letters, Vol. 308, Issue 1-2
Thermal equation of state of hcp-iron: Constraint on the density deficit of Earth's solid inner core: THERMAL EQUATION OF STATE OF HCP-IRON
journal, July 2016
- Fei, Yingwei; Murphy, Caitlin; Shibazaki, Yuki
- Geophysical Research Letters, Vol. 43, Issue 13
Sound velocity in iron carbide (Fe3C) at high pressure: Implications for the carbon content of the Earth's inner core
journal, January 2009
- Fiquet, Guillaume; Badro, James; Gregoryanz, Eugene
- Physics of the Earth and Planetary Interiors, Vol. 172, Issue 1-2
The axial ratio of hcp Fe and Fe–Ni–Si alloys to the conditions of Earth’s inner core
journal, November 2015
- Fischer, Rebecca A.; Campbell, Andrew J.
- American Mineralogist, Vol. 100, Issue 11-12
Equation of state and phase diagram of Fe–16Si alloy as a candidate component of Earth's core
journal, December 2012
- Fischer, Rebecca A.; Campbell, Andrew J.; Caracas, Razvan
- Earth and Planetary Science Letters, Vol. 357-358
Pressure-induced magnetic transition and sound velocities of Fe 3 C: Implications for carbon in the Earth's inner core
journal, January 2008
- Gao, Lili; Chen, Bin; Wang, Jingyun
- Geophysical Research Letters, Vol. 35, Issue 17
Sound velocities of compressed Fe 3 C from simultaneous synchrotron X-ray diffraction and nuclear resonant scattering measurements
journal, September 2009
- Gao, Lili; Chen, Bin; Lerche, Michael
- Journal of Synchrotron Radiation, Vol. 16, Issue 6
PVT equation of state of epsilon iron and its densities at inner core conditions
journal, May 2011
- Garai, J.; Chen, J.; Telekes, G.
- American Mineralogist, Vol. 96, Issue 5-6
Phonon Spectroscopy of Oriented hcp Iron
journal, January 2002
- Giefers, H.; Lübbers, R.; Rupprecht, K.
- High Pressure Research, Vol. 22, Issue 2
Sound velocities for hexagonally close-packed iron compressed hydrostatically to 136 GPa from phonon density of states: SOUND VELOCITIES FOR HCP-IRON
journal, June 2013
- Gleason, A. E.; Mao, W. L.; Zhao, J. Y.
- Geophysical Research Letters, Vol. 40, Issue 12
Equation of state of iron?silicon alloys to megabar pressure
journal, July 2004
- Hirao, N.; Ohtani, E.; Kondo, T.
- Physics and Chemistry of Minerals, Vol. 31, Issue 6
Composition and State of the Core
journal, May 2013
- Hirose, Kei; Labrosse, Stéphane; Hernlund, John
- Annual Review of Earth and Planetary Sciences, Vol. 41, Issue 1
Regression and time series model selection in small samples
journal, January 1989
- Hurvich, Clifford M.; Tsai, Chih-Ling
- Biometrika, Vol. 76, Issue 2
Properties of iron at high pressures and the state of the core
journal, January 1979
- Jeanloz, Raymond
- Journal of Geophysical Research, Vol. 84, Issue B11
Constraints on seismic velocities in the Earth from traveltimes
journal, July 1995
- Kennett, B. L. N.; Engdahl, E. R.; Buland, R.
- Geophysical Journal International, Vol. 122, Issue 1
Physics of Iron at Earth's Core Conditions
journal, February 2000
- Laio, A.
- Science, Vol. 287, Issue 5455
Static compression of iron-silicon alloys: Implications for silicon in the Earth's core: IRON-SILICON ALLOYS
journal, January 2003
- Lin, Jung-Fu; Campbell, Andrew J.; Heinz, Dion L.
- Journal of Geophysical Research: Solid Earth, Vol. 108, Issue B1
Sound velocities of iron-nickel and iron-silicon alloys at high pressures
journal, January 2003
- Lin, Jung-Fu
- Geophysical Research Letters, Vol. 30, Issue 21
Magnetic transition and sound velocities of Fe3S at high pressure: implications for Earth and planetary cores
journal, September 2004
- Lin, Jung-Fu; Fei, Yingwei; Sturhahn, Wolfgang
- Earth and Planetary Science Letters, Vol. 226, Issue 1-2
Sound Velocities of Hot Dense Iron: Birch's Law Revisited
journal, June 2005
- Lin, J. -F.
- Science, Vol. 308, Issue 5730
Composition of the Earth’s core: A review
journal, January 2016
- Litasov, K. D.; Shatskiy, A. F.
- Russian Geology and Geophysics, Vol. 57, Issue 1
Sound velocities of bcc-Fe and Fe0.85Si0.15 alloy at high pressure and temperature
journal, August 2014
- Liu, Jin; Lin, Jung-Fu; Alatas, Ahmet
- Physics of the Earth and Planetary Interiors, Vol. 233
Density of Phonon States in Iron at High Pressure
journal, February 2000
- Lübbers, R.
- Science, Vol. 287, Issue 5456
Static compression of iron to 300 GPa and Fe 0.8 Ni 0.2 alloy to 260 GPa: Implications for composition of the core
journal, January 1990
- Mao, H. K.; Wu, Y.; Chen, L. C.
- Journal of Geophysical Research, Vol. 95, Issue B13
Phonon Density of States of Iron up to 153 Gigapascals
journal, May 2001
- Mao, H. K.
- Science, Vol. 292, Issue 5518
Nuclear resonant x-ray scattering of iron hydride at high pressure
journal, January 2004
- Mao, Wendy L.
- Geophysical Research Letters, Vol. 31, Issue 15
Experimental determination of the elasticity of iron at high pressure
journal, January 2008
- Mao, Wendy L.; Struzhkin, Viktor V.; Baron, Alfred Q. R.
- Journal of Geophysical Research, Vol. 113, Issue B9
Sound velocities of Fe and Fe-Si alloy in the Earth's core
journal, June 2012
- Mao, Z.; Lin, J. -F.; Liu, J.
- Proceedings of the National Academy of Sciences, Vol. 109, Issue 26
The effect of nickel on the properties of iron at the conditions of Earth's inner core: Ab initio calculations of seismic wave velocities of Fe–Ni alloys
journal, March 2013
- Martorell, Benjamí; Brodholt, John; Wood, Ian G.
- Earth and Planetary Science Letters, Vol. 365
Strong Premelting Effect in the Elastic Properties of hcp-Fe Under Inner-Core Conditions
journal, October 2013
- Martorell, B.; Vocadlo, L.; Brodholt, J.
- Science, Vol. 342, Issue 6157
The elastic properties of hcp-Fe 1−x Si x at Earth's inner-core conditions
journal, October 2016
- Martorell, Benjamí; Wood, Ian G.; Brodholt, John
- Earth and Planetary Science Letters, Vol. 451
On the resolution of density within the Earth
journal, November 2003
- Masters, Guy; Gubbins, David
- Physics of the Earth and Planetary Interiors, Vol. 140, Issue 1-3
The composition of the Earth
journal, March 1995
- McDonough, W. F.; Sun, S. -s.
- Chemical Geology, Vol. 120, Issue 3-4
Shock-wave compression of iron-nickel alloys and the Earth's core
journal, March 1966
- McQueen, R. G.; Marsh, S. P.
- Journal of Geophysical Research, Vol. 71, Issue 6
Raman Spectroscopy of Iron to 152 Gigapascals: Implications for Earth's Inner Core
journal, June 2000
- Merkel, S.
- Science, Vol. 288, Issue 5471
Melting experiments on Fe–Fe 3 S system to 254 GPa
journal, April 2017
- Mori, Yuko; Ozawa, Haruka; Hirose, Kei
- Earth and Planetary Science Letters, Vol. 464
Grüneisen parameter of hcp-Fe to 171 GPa: GRÜNEISEN PARAMETER OF Fe
journal, December 2011
- Murphy, Caitlin A.; Jackson, Jennifer M.; Sturhahn, Wolfgang
- Geophysical Research Letters, Vol. 38, Issue 24
Melting and thermal pressure of hcp-Fe from the phonon density of states
journal, September 2011
- Murphy, Caitlin A.; Jackson, Jennifer M.; Sturhahn, Wolfgang
- Physics of the Earth and Planetary Interiors, Vol. 188, Issue 1-2
Melting of iron at the physical conditions of the Earth's core
journal, January 2004
- Nguyen, Jeffrey H.; Holmes, Neil C.
- Nature, Vol. 427, Issue 6972
Study of the thermodynamic stability of iron at inner core from first-principles theory combined with lattice dynamics
journal, November 2015
- Niu, Zhen-Wei; Zeng, Zhao-Yi; Cai, Ling-Cang
- Physics of the Earth and Planetary Interiors, Vol. 248
Sound velocity of hexagonal close‐packed iron up to core pressures
journal, October 2013
- Ohtani, Eiji; Shibazaki, Yuki; Sakai, Takeshi
- Geophysical Research Letters, Vol. 40, Issue 19
Equation of state and elasticity of B2-type FeSi: Implications for silicon in the inner core
journal, November 2013
- Ono, Shigeaki
- Physics of the Earth and Planetary Interiors, Vol. 224
Equation of state of the high-pressure polymorph of FeSi to 67 GPa [Equation of state of the high-pressure polymorph of FeSi to 67 GPa]
journal, April 2007
- Ono, Shigeaki; Kikegawa, Takumi; Ohishi, Yasuo
- European Journal of Mineralogy, Vol. 19, Issue 2
High-pressure magnetic transition in hcp-Fe
journal, May 2010
- Ono, S.; Kikegawa, T.; Hirao, N.
- American Mineralogist, Vol. 95, Issue 5-6
DIOPTAS : a program for reduction of two-dimensional X-ray diffraction data and data exploration
journal, May 2015
- Prescher, Clemens; Prakapenka, Vitali B.
- High Pressure Research, Vol. 35, Issue 3
Oxygen and silicon contents of Earth's core from high pressure metal–silicate partitioning experiments
journal, October 2011
- Ricolleau, Angele; Fei, Yingwei; Corgne, Alexandre
- Earth and Planetary Science Letters, Vol. 310, Issue 3-4
Equation of state of pure iron and Fe0.9Ni0.1 alloy up to 3Mbar
journal, March 2014
- Sakai, Takeshi; Takahashi, Suguru; Nishitani, Naoya
- Physics of the Earth and Planetary Interiors, Vol. 228
Sound velocity measurements of hcp Fe-Si alloy at high pressure and high temperature by inelastic X-ray scattering
journal, January 2018
- Sakairi, Takanori; Sakamaki, Tatsuya; Ohtani, Eiji
- American Mineralogist, Vol. 103, Issue 1
Constraints on Earth’s inner core composition inferred from measurements of the sound velocity of hcp-iron in extreme conditions
journal, February 2016
- Sakamaki, Tatsuya; Ohtani, Eiji; Fukui, Hiroshi
- Science Advances, Vol. 2, Issue 2
Sound velocity measurements in dhcp-FeH up to 70GPa with inelastic X-ray scattering: Implications for the composition of the Earth's core
journal, January 2012
- Shibazaki, Yuki; Ohtani, Eiji; Fukui, Hiroshi
- Earth and Planetary Science Letters, Vol. 313-314
First-principles elastic constants for the hcp transition metals Fe, Co, and Re at high pressure
journal, July 1999
- Steinle-Neumann, Gerd; Stixrude, Lars; Cohen, Ronald E.
- Physical Review B, Vol. 60, Issue 2
Elasticity of iron at the temperature of the Earth's inner core
journal, September 2001
- Steinle-Neumann, Gerd; Stixrude, Lars; Cohen, R. E.
- Nature, Vol. 413, Issue 6851
Composition and temperature of Earth's inner core
journal, November 1997
- Stixrude, Lars; Wasserman, Evgeny; Cohen, Ronald E.
- Journal of Geophysical Research: Solid Earth, Vol. 102, Issue B11
CONUSS and PHOENIX: Evaluation of nuclear resonant scattering data
journal, March 2000
- Sturhahn, W.
- Hyperfine Interactions, Vol. 125, Issue 1/4, p. 149-172
Nuclear resonant spectroscopy
journal, January 2004
- Sturhahn, Wolfgang
- Journal of Physics: Condensed Matter, Vol. 16, Issue 5
Isothermal compression of the alloys of iron up to 300 kilobars at room temperature: Iron-nickel alloys
journal, July 1968
- Takahashi, Taro; Bassett, William A.; Mao, Ho-Kwang
- Journal of Geophysical Research, Vol. 73, Issue 14
The structure of Fe–Si alloy in Earth's inner core
journal, May 2015
- Tateno, Shigehiko; Kuwayama, Yasuhiro; Hirose, Kei
- Earth and Planetary Science Letters, Vol. 418
High-Pressure Geophysical Properties of Fcc Phase FeH X
journal, January 2018
- Thompson, E. C.; Davis, A. H.; Bi, W.
- Geochemistry, Geophysics, Geosystems, Vol. 19, Issue 1
Monochromatization of synchrotron radiation for nuclear resonant scattering experiments
journal, January 2000
- Toellner, T. S.
- Hyperfine Interactions, Vol. 125, Issue 1/4, p. 3-28
Effects of Si on the elastic property of Fe at Earth's inner core pressures: First principles study
journal, May 2009
- Tsuchiya, Taku; Fujibuchi, Mika
- Physics of the Earth and Planetary Interiors, Vol. 174, Issue 1-4
Stability field and thermal equation of state of ε-iron determined by synchrotron X-ray diffraction in a multianvil apparatus
journal, October 2001
- Uchida, Takeyuki; Wang, Yanbin; Rivers, Mark L.
- Journal of Geophysical Research: Solid Earth, Vol. 106, Issue B10
Ab initio calculations of the elasticity of iron and iron alloys at inner core conditions: Evidence for a partially molten inner core?
journal, February 2007
- Vočadlo, Lidunka
- Earth and Planetary Science Letters, Vol. 254, Issue 1-2
Ab initio free energy calculations on the polymorphs of iron at core conditions
journal, January 2000
- Vočadlo, Lidunka; Brodholt, John; Alfè, Dario
- Physics of the Earth and Planetary Interiors, Vol. 117, Issue 1-4
Ab initio calculations of the elasticity of hcp-Fe as a function of temperature at inner-core pressure
journal, November 2009
- Vočadlo, Lidunka; Dobson, David P.; Wood, Ian G.
- Earth and Planetary Science Letters, Vol. 288, Issue 3-4
Lattice dynamic of Ti, Co, Tc, and other hcp transition metals
journal, April 1982
- Wakabayashi, N.; Scherm, R. H.; Smith, H. G.
- Physical Review B, Vol. 25, Issue 8
Thermal properties of iron at high pressures and temperatures
journal, April 1996
- Wasserman, Evgeny; Stixrude, Lars; Cohen, Ronald E.
- Physical Review B, Vol. 53, Issue 13
Very low sound velocities in iron-rich (Mg,Fe)O: Implications for the core-mantle boundary region: SOUND VELOCITIES OF IRON-RICH (Mg,Fe)O
journal, August 2010
- Wicks, J. K.; Jackson, J. M.; Sturhahn, W.
- Geophysical Research Letters, Vol. 37, Issue 15
Sound velocity and density of magnesiowüstites: Implications for ultralow‐velocity zone topography
journal, March 2017
- Wicks, June K.; Jackson, Jennifer M.; Sturhahn, Wolfgang
- Geophysical Research Letters, Vol. 44, Issue 5
Carbon in the Core: Its Influence on the Properties of Core and Mantle
journal, January 2013
- Wood, B. J.; Li, J.; Shahar, A.
- Reviews in Mineralogy and Geochemistry, Vol. 75, Issue 1
P‐V‐T equation of state for ε ‐iron up to 80 GPa and 1900 K using the Kawai‐type high pressure apparatus equipped with sintered diamond anvils
journal, October 2012
- Yamazaki, Daisuke; Ito, Eiji; Yoshino, Takashi
- Geophysical Research Letters, Vol. 39, Issue 20
Thermal equation of state of iron and Fe 0.91 Si 0.09
journal, February 1999
- Zhang, J.; Guyot, F.
- Physics and Chemistry of Minerals, Vol. 26, Issue 3
Carbon and other light element contents in the Earth's core based on first-principles molecular dynamics
journal, November 2012
- Zhang, Y.; Yin, Q. -Z.
- Proceedings of the National Academy of Sciences, Vol. 109, Issue 48
Shock compression of Fe-Ni-Si system to 280 GPa: Implications for the composition of the Earth's outer core: Sekine, et al.: Shock compression of Fe-Ni-Si system
journal, July 2014
- Zhang, Youjun; Sekine, Toshimori; He, Hongliang
- Geophysical Research Letters, Vol. 41, Issue 13
Temperature of Earth's core constrained from melting of Fe and Fe0.9Ni0.1 at high pressures
journal, August 2016
- Zhang, Dongzhou; Jackson, Jennifer M.; Zhao, Jiyong
- Earth and Planetary Science Letters, Vol. 447