Startseite Naturwissenschaften Single-crystal equations of state of magnesiowüstite at high pressures
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Single-crystal equations of state of magnesiowüstite at high pressures

  • Gregory J. Finkelstein EMAIL logo , Jennifer M. Jackson , Wolfgang Sturhahn , Dongzhou Zhang , E. Ercan Alp und Thomas S. Toellner
Veröffentlicht/Copyright: 31. Juli 2017
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American Mineralogist
Aus der Zeitschrift American Mineralogist Band 102 Heft 8

Abstract

Solid solutions of (Mg,Fe)O with high iron enrichment may be an important component of ultralow-velocity zones at Earth’s core-mantle boundary. However, to date there have been few high-precision studies on the elastic properties of these materials. In this study we present results on the compression of (Mg0.22Fe0.78)O magnesiowüstite in both neon and helium pressure media using single-crystal diffraction to ~55 GPa. In addition, our sample was characterized by time-domain synchrotron Mössbauer spectroscopy at ambient pressure using an extended time range that resulted in vastly improved energy resolution. The combination of these high-resolution techniques tightly constrains the presence of a defect-structure component at room pressure due to 4.7 mol% tetrahedrally coordinated ferric iron, resulting in a renormalized composition of (Mg0.215Fe0.762□0.023)O. Both high-pressure diffraction data sets are well described by a third-order Birch-Murnaghan equation of state. The best fit-parameters for a crystal with cubic structure in helium are K0T = 148(3) GPa, K′0T = 4.09(12), and V0 = 78.87(6) Å3. Increasing differential stress in the neon-containing sample chamber was correlated with increasing apparent distortion of the initially cubic unit cell, requiring a lower-symmetry hexagonal cell to fit the data above ~20 GPa. For fit equations of state, we determine the pressure-dependent correlation ellipses for the equation of state parameters and compare with previously published single-crystal diffraction data from (Mg,Fe)O crystals in a helium medium. We make two main observations from the data sets using a helium pressure medium: K0T decreases as a function of increasing iron content from periclase to wüstite and K′0T is consistent with an approximately constant value of 4.0 that is independent of iron content, at least up to the iron concentration measured here. In combination with previously reported thermal parameters, we compute the density of magnesiowüstite with this composition at core-mantle boundary conditions and discuss the implications.

Keywords: Magnesiowüstite; single-crystal diffraction; elasticity; equations of state; Mössbauer spectroscopy; high pressure
* Present address: Hawaii Institute of Geophysics and Planetology, University of Hawaii, School of Ocean and Earth Science and Technology, 1680 East West Road, Honolulu, HI 96822, U.S.A.

Acknowledgments

This work was supported by National Science Foundation (EAR) CSEDI-1161046, CAREER-0956166, and the Caltech Seismological Laboratory Director’s Postdoctoral Fellowship. The GSECARS gas-loading system, APS Sector 3, and GSECARS PX2 are partially supported by COMPRES. We are thankful for the single-crystal sample provided to us by Stephen J. Mackwell. We thank Natalia Solomatova, Rachel Morrison, Przemek Dera, Jiyong Zhao, Wenli Bi, Christine Beavers, Simon Teat, Vitali Prakapenka, Clemens Prescher, and Sergey Tkachev for their assistance with our experiments. We also thank two anonymous reviewers for their constructive comments, which helped to improve the manuscript.

References cited

Angel, R.J. (2000) Equations of state. Reviews in Mineralogy and Geochemistry, 41, 35–59.10.1515/9781501508707-006Suche in Google Scholar

Badro, J., Siebert, J., and Nimmo, F. (2016) An early geodynamo driven by exsolution of mantle components from Earth’s core. Nature, 536, 326–328.10.1038/nature18594Suche in Google Scholar

Boehler, R., and De Hantsetters, K. (2007) New anvil designs in diamond-cells. High Pressure Research, 24, 391–396.10.1080/08957950412331323924Suche in Google Scholar

Bower, D.J., Wicks, J.K., Gurnis, M., and Jackson, J.M. (2011) A geodynamic and mineral physics model of a solid-state ultralow-velocity zone. Earth and Planetary Science Letters, 303, 193–202.10.1016/j.epsl.2010.12.035Suche in Google Scholar

Bruker (2012a) APEX2. Bruker AXS Inc., Madison, Wisconsin, U.S.A.Suche in Google Scholar

Bruker (2012b) CELL_NOW. Bruker AXS Inc., Madison, Wisconsin, U.S.A.Suche in Google Scholar

Dera, P., Finkelstein, G.J., Duffy, T.S., Downs, R.T., Meng, Y., Prakapenka, V., and Tkachev, S. (2013a) Metastable high-pressure transformations of orthoferrosilite Fs82. Physics of the Earth and Planetary Interiors, 221, 15–21.10.1016/j.pepi.2013.06.006Suche in Google Scholar

Dera, P., Zhuravlev, K., Prakapenka, V., Rivers, M.L., Finkelstein, G.J., Grubor-Urosevic, O., Tschauner, O., Clark, S.M., and Downs, R.T. (2013b) High pressure single-crystal micro X-ray diffraction analysis with GSE_ADA/RSV software. High Pressure Research, 33, 466–484.10.1080/08957959.2013.806504Suche in Google Scholar

Dewaele, A., Loubeyre, P., and Mezouar, M. (2004) Equations of state of six metals above 94 GPa. Physical Review B, 70, 094112.10.1103/PhysRevB.70.094112Suche in Google Scholar

Dyar, M.D., Agresti, D.G., Schaefer, M.W., Grant, C.A., and Sklute, E.C. (2006) Mössbauer spectroscopy of Earth and planetary materials. Annual Review of Earth and Planetary Sciences, 34, 83–125.10.1146/annurev.earth.34.031405.125049Suche in Google Scholar

Dziewonski, A.M., and Anderson, D.L. (1981) Preliminary reference Earth model. Physics of the Earth and Planetary Interiors, 25, 297–356.10.1016/0031-9201(81)90046-7Suche in Google Scholar

Fei, Y., Wang, Y., and Finger, L.W. (1996) Maximum solubility of FeO in (Mg, Fe) SiO3-perovskite as a function of temperature at 26 GPa: Implication for FeO content in the lower mantle. Journal of Geophysical Research, 101, 11525–11530.10.1029/96JB00408Suche in Google Scholar

Finkelstein, G.J., Dera, P.K., Jahn, S., Oganov, A.R., Holl, C.M., Meng, Y., and Duffy, T.S. (2014) Phase transitions and equation of state of forsterite to 90 GPa from single-crystal X-ray diffraction and molecular modeling. American Mineralogist, 99, 35–43.10.2138/am.2014.4526Suche in Google Scholar

Fischer, R.A., and Campbell, A.J. (2010) High-pressure melting of wüstite. American Mineralogist, 95, 1473–1477.10.2138/am.2010.3463Suche in Google Scholar

Hazen, R.M., and Jeanloz, R. (1984) Wüstite (Fe1-xO): A review of its defect structure and physical properties. Reviews of Geophysics, 22, 37–46.10.1029/RG022i001p00037Suche in Google Scholar

Irifune, T. (1994) Absence of an aluminous phase in the upper part of the Earth’s lower mantle. Nature, 370, 131–113.10.1038/370131a0Suche in Google Scholar

Jacobsen, S.D. (2002) Structure and elasticity of single-crystal (Mg,Fe)O and a new method of generating shear waves for gigahertz ultrasonic interferometry. Journal of Geophysical Research, 107, 2037.10.1029/2001JB000490Suche in Google Scholar

Jacobsen, S.D., and Spetzler, H. (2004) Shear waves in the diamond-anvil cell reveal pressure-induced instability in (Mg,Fe)O. Proceedings of the National Academy of Sciences, 101, 5867–5871.10.1073/pnas.0401564101Suche in Google Scholar

Jacobsen, S.D., Lin, J.-F., Angel, R.J., Shen, G., Prakapenka, V.B., Dera, P., Mao, H.-K., and Hemley, R.J. (2005) Single-crystal synchrotron X-ray diffraction study of wüstite and magnesiowüstite at lower-mantle pressures. Journal of Synchrotron Radiation, 12, 577–583.10.1107/S0909049505022326Suche in Google Scholar

Jacobsen, S.D., Holl, C.M., Adams, K.A., Fischer, R.A., Martin, E.S., Bina, C.R., Lin, J.F., Prakapenka, V.B., Kubo, A., and Dera, P. (2008) Compression of single-crystal magnesium oxide to 118 GPa and a ruby pressure gauge for helium pressure media. American Mineralogist, 93, 1823–1828.10.2138/am.2008.2988Suche in Google Scholar

Johnson, D.P. (1969) Mössbauer study of the local environments of 57Fe in FeO. Solid State Communications, 7, 1785–1788.10.1016/0038-1098(69)90285-3Suche in Google Scholar

Kantor, I.Y., McCammon, C.A., and Dubrovinsky, L.S. (2004) Mössbauer spectroscopic study of pressure-induced magnetisation in wüstite (FeO). Journal of Alloys and Compounds, 376, 5–8.10.1016/j.jallcom.2003.11.159Suche in Google Scholar

Kantor, I., Prakapenka, V., Kantor, A., Dera, P., Kurnosov, A., Sinogeikin, S., Dubrovinskaia, N., and Dubrovinsky, L. (2012) BX90: A new diamond anvil cell design for X-ray diffraction and optical measurements. Review of Scientific Instruments, 83, 125102.10.1063/1.4768541Suche in Google Scholar PubMed

Kato, C., Hirose, K., Nomura, R., Ballmer, M.D., Miyake, A., and Ohishi, Y. (2016) Melting in the FeO-SiO2 system to deep lower-mantle pressures: Implications for subducted banded iron formations. Earth and Planetary Science Letters, 440, 56–61.10.1016/j.epsl.2016.02.011Suche in Google Scholar

Klotz, S., Chervin, J.-C., Munsch, P., and Le Marchand, G. (2009) Hydrostatic limits of 11 pressure transmitting media. Journal of Physics D: Applied Physics, 42, 075413.10.1088/0022-3727/42/7/075413Suche in Google Scholar

Lin, J.-F., Gavriliuk, A.G., Struzhkin, V. V., Jacobsen, S.D., Sturhahn, W., Hu, M.Y., Chow, P., and Yoo, C.-S. (2006) Pressure-induced electronic spin transition of iron in magnesiowustite-(Mg,Fe)O. Physical Review B, 73, 113107.10.1103/PhysRevB.73.113107Suche in Google Scholar

Lin, J.F., Vanko, G., Jacobsen, S.D., Iota, V., Struzhkin, V.V., Prakapenka, V.B., Kuznetsov, A., and Yoo, C.S. (2007) Spin transition zone in Earth’s lower mantle. Science, 317, 1740–1743.10.1126/science.1144997Suche in Google Scholar PubMed

Mackwell, S., Bystricky, M., and Sproni, C. (2005) Fe–Mg interdiffusion in (Mg,Fe)O. Physics and Chemistry of Minerals, 32, 418–425.10.1007/s00269-005-0013-6Suche in Google Scholar

Manga, M., and Jeanloz, R. (1996) Implications of a metal-bearing chemical boundary layer in D” for mantle dynamics. Geophysical Research Letters, 23, 3091–3094.10.1029/96GL03021Suche in Google Scholar

Mao, H. (1997) Multivariable dependence of Fe-Mg partitioning in the lower mantle. Science, 278, 2098–2100.10.1126/science.278.5346.2098Suche in Google Scholar PubMed

Mao, W.L., Mao, H.-K., Sturhahn, W., Zhao, J., Prakapenka, V.B., Meng, Y., Shu, J., Fei, Y., and Hemley, R.J. (2006) Iron-rich post-perovskite and the origin of ultralow-velocity zones. Science, 312, 564–565.10.1126/science.1123442Suche in Google Scholar PubMed

Mao, Z., Lin, J.-F., Liu, J., and Prakapenka, V.B. (2011) Thermal equation of state of lower-mantle ferropericlase across the spin crossover. Geophysical Research Letters, 38, L23308.10.1029/2011GL049915Suche in Google Scholar

McCammon, C.A., and Price, D.C. (1985) Mössbauer spectra of FexO (x>0.95). Physics and Chemistry of Minerals, 11, 250–254.10.1007/BF00307402Suche in Google Scholar

Ohta, K., Fujino, K., Kuwayama, Y., Kondo, T., Shimizu, K., and Ohishi, Y. (2014) Highly conductive iron-rich (Mg,Fe)O magnesiowüstite and its stability in the Earth’s lower mantle. Journal of Geophysical Research (Solid Earth), 119, 4656–4665.10.1002/2014JB010972Suche in Google Scholar

O’Rourke, J.G., and Stevenson, D.J. (2016) Powering Earth’s dynamo with magnesium precipitation from the core. Nature, 529, 387–389.10.1038/nature16495Suche in Google Scholar PubMed

Rivers, M., Prakapenka, V.B., Kubo, A., Pullins, C., Holl, C.M., and Jacobsen, S.D. (2008) The COMPRES/GSECARS gas-loading system for diamond anvil cells at the Advanced Photon Source. High Pressure Research, 28, 273–292.10.1080/08957950802333593Suche in Google Scholar

Rost, S., Garnero, E.J., and Williams, Q. (2006) Fine-scale ultralow-velocity zone structure from high-frequency seismic array data. Journal of Geophysical Research, 111, B09310.10.1029/2005JB004088Suche in Google Scholar

Saines, P.J., Tucker, M.G., Keen, D.A., Cheetham, A.K., and Goodwin, A.L. (2013) Coupling of the local defect and magnetic structure of wüstite Fe1–xO. Physical Review B, 88, 134418.10.1103/PhysRevB.88.134418Suche in Google Scholar

Shu, J., Mao, H., Hu, J., and Fei, Y. (1998) Single-crystal X-ray diffraction of wüstite to 30 GPa hydrostatic pressure. Neues Jahrbuch für Mineralogie Abhandlungen, 172, 309–323.10.1127/njma/172/1998/309Suche in Google Scholar

Sinmyo, R., Hirose, K., Nishio Hamane, D., Seto, Y., Fujino, K., Sata, N., and Ohishi, Y. (2008) Partitioning of iron between perovskite/postperovskite and ferropericlase in the lower mantle. Journal of Geophysical Research (Solid Earth), 113, B11204.10.1029/2008JB005730Suche in Google Scholar

Solomatova, N.V., Jackson, J.M., Sturhahn, W., Wicks, J.K., Zhao, J., Toellner, T.S., Kalkan, B., and Steinhardt, W.M. (2016) Equation of state and spin crossover of (Mg,Fe)O at high pressure, with implications for explaining topographic relief at the core-mantle boundary. American Mineralogist, 101, 1084–1093.10.2138/am-2016-5510Suche in Google Scholar

Struzhkin, V. V., Mao, H.-K., Hu, J., Schwoerer-Böhning, M., Shu, J., Hemley, R.J., Sturhahn, W., Hu, M.Y., Alp, E.E., Eng, P., and others. (2001) Nuclear inelastic X-ray scattering of FeO to 48 GPa. Physical Review Letters, 87, 255501.10.1103/PhysRevLett.87.255501Suche in Google Scholar PubMed

Sturhahn, W. (2001) Phase problem in synchrotron Mössbauer spectroscopy. Physical Review B, 63, 124.10.1103/PhysRevB.63.094105Suche in Google Scholar

Sturhahn, W. (2015a) MINUTI (MINeral physics UTIlities). Open source software, http://www.nrixs.com.Suche in Google Scholar

Sturhahn, W.(2015b) CONUSS (COherent NUclear resonant Scattering by Single crystals). Open source software, http://www.nrixs.com.Suche in Google Scholar

Sun, D., Helmberger, D.V., Jackson, J.M., Clayton, R.W., and Bower, D.J. (2013) Rolling hills on the core–mantle boundary. Earth and Planetary Science Letters, 361, 333–342.10.1016/j.epsl.2012.10.027Suche in Google Scholar

Thorne, M.S., and Garnero, E.J. (2004) Inferences on ultralow-velocity zone structure from a global analysis of SPdKS waves. Journal of Geophysical Research, 109, B08301.Suche in Google Scholar

Toellner, T.S. (2000) Monochromatization of synchrotron radiation for nuclear resonant scattering experiments. Hyperfine Interactions, 125, 3–28.10.1023/A:1012621317798Suche in Google Scholar

Tschauner, O., Ma, C., Beckett, J.R., Prescher, C., Prakapenka, V.B., and Rossman, G.R. (2014) Discovery of bridgmanite, the most abundant mineral in Earth, in a shocked meteorite. Science, 346, 1100–1102.10.1126/science.1259369Suche in Google Scholar PubMed

Van der Hilst, R.D., De Hoop, M.V., Wang, P., Shim, S.H., Ma, P., and Tenorio, L. (2007) Seismostratigraphy and thermal structure of Earth’s core-mantle boundary region. Science, 315, 1813–1817.10.1126/science.1137867Suche in Google Scholar PubMed

Welberry, T.R., and Christy, A.G. (1997) Defect distribution and the diffuse X-ray diffraction pattern of wustite, Fe1-xO. Physics and Chemistry of Minerals, 24, 24–38.10.1007/s002690050014Suche in Google Scholar

Wen, L. (1998) Ultra-low velocity zones near the core-mantle boundary from broadband PKP precursors. Science, 279, 1701–1703.10.1126/science.279.5357.1701Suche in Google Scholar PubMed

Westrenen, W.V., Li, J., Fei, Y., Frank, M.R., Hellwig, H., Komabayashi, T., Mibe, K., Minarik, W.G., Orman, J.A.V., Watson, H.C., and others. (2005) Thermoelastic properties of (Mg0.64Fe0.36)O ferropericlase based on in situ X-ray diffraction to 26.7GPa and 2173K. Physics of the Earth and Planetary Interiors, 151, 163–176.10.1016/j.pepi.2005.03.001Suche in Google Scholar

Wicks, J.K., Jackson, J.M., and Sturhahn, W. (2010) Very low sound velocities in iron-rich (Mg,Fe)O: Implications for the core-mantle boundary region. Geophysical Research Letters, 37, L15304.10.1029/2010GL043689Suche in Google Scholar

Wicks, J.K., Jackson, J.M., Sturhahn, W., Zhuravlev, K.K., Tkachev, S.N., and Prakapenka, V.B. (2015) Thermal equation of state and stability of (Mg0.06Fe0.94)O. Physics of the Earth and Planetary Interiors, 249, 28–42.10.1016/j.pepi.2015.09.003Suche in Google Scholar

Wicks, J.K., Jackson, J.M., Sturhahn, W., and Zhang, D. (2017) Sound velocity and density of magnesiowüstites: Implications for ultralow-velocity zone topography. Geophysical Research Letters, 44, 2148–2158.10.1002/2016GL071225Suche in Google Scholar

Williams, Q., Revenaugh, J., and Garnero, E. (1998) A correlation between ultra-low basal velocities in the mantle and hot spots. Science, 281, 546–549.10.1126/science.281.5376.546Suche in Google Scholar PubMed

Zha, C.-S., Mao, H.-K., and Hemley, R.J. (2000) Elasticity of MgO and a primary pressure scale to 55 GPa. Proceedings of the National Academy of Sciences, 97, 13494–13499.10.1073/pnas.240466697Suche in Google Scholar PubMed PubMed Central

Zhang, L., and Fei, Y. (2008) Melting behavior of (Mg,Fe)O solid solutions at high pressure. Geophysical Research Letters, 35, L13302.10.1029/2008GL034585Suche in Google Scholar

Zhang, D., Jackson, J.M., Zhao, J., Sturhahn, W., Alp, E.E., Toellner, T.S., and Hu, M.Y. (2015) Fast temperature spectrometer for samples under extreme conditions. Review of Scientific Instruments, 86, 013105.10.1063/1.4905431Suche in Google Scholar PubMed

Zhang, D., Jackson, J.M., Zhao, J., Sturhahn, W., Alp, E.E., Hu, M.Y., Toellner, T.S., Murphy, C.A., and Prakapenka, V.B. (2016) Temperature of Earth’s core constrained from melting of Fe and Fe0.9Ni0.1 at high pressures. Earth and Planetary Science Letters, 447, 72–83.10.1016/j.epsl.2016.04.026Suche in Google Scholar

Zhuravlev, K.K., Jackson, J.M., Wolf, A.S., Wicks, J.K., Yan, J., and Clark, S.M. (2010) Isothermal compression behavior of (Mg,Fe)O using neon as a pressure medium. Physics and Chemistry of Minerals, 37, 465–474.10.1007/s00269-009-0347-6Suche in Google Scholar

Received: 2016-9-24
Accepted: 2017-4-16
Published Online: 2017-7-31
Published in Print: 2017-8-28

© 2017 by Walter de Gruyter Berlin/Boston

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https://doi.org/10.2138/am-2017-5966
Schlagwörter für diesen Artikel
Magnesiowüstite; single-crystal diffraction; elasticity; equations of state; Mössbauer spectroscopy; high pressure

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