Bulk modulus of Fe-rich olivines corrected for non-hydrostaticity
| Autor: | Haiyan Chen, Nicolas Tercé, Matthew L. Whitaker, Frédéric Béjina, Misha Bystricky |
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| Přispěvatelé: | Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Brookhaven National Laboratory [Upton, NY] (BNL), UT-Battelle, LLC-Stony Brook University [SUNY] (SBU), State University of New York (SUNY)-State University of New York (SUNY)-U.S. Department of Energy [Washington] (DOE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), U.S. Department of Energy [Washington] (DOE)-UT-Battelle, LLC-Stony Brook University [SUNY] (SBU), State University of New York (SUNY)-State University of New York (SUNY) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Diffraction
Global and Planetary Change Bulk modulus Equation of state Materials science Olivine 010504 meteorology & atmospheric sciences [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Analytical chemistry [SDU.STU]Sciences of the Universe [physics]/Earth Sciences engineering.material 010502 geochemistry & geophysics 01 natural sciences law.invention Isothermal bulk modulus law [SDU]Sciences of the Universe [physics] engineering General Earth and Planetary Sciences Hydrostatic equilibrium Differential stress ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences Linear trend [SDU.STU.MI]Sciences of the Universe [physics]/Earth Sciences/Mineralogy |
| Zdroj: | Comptes Rendus Géoscience Comptes Rendus Géoscience, 2019, 351 (2-3), pp.86-94. ⟨10.1016/j.crte.2018.06.002⟩ Comptes Rendus Géoscience, Elsevier, 2019, 351 (2-3), pp.86-94. ⟨10.1016/j.crte.2018.06.002⟩ |
| DOI: | 10.1016/j.crte.2018.06.002⟩ |
| Popis: | In situ X-ray diffraction was used to measure the isothermal bulk modulus at room conditions (KT0) of synthetic olivines with different iron contents. The chemical formulae of the olivine samples were ( Fe x , Mg 1 − x ) 2 Si O 4 with x = 0.45; 0.64; 0.82; 1, with 1% standard deviation (referenced as Fa45, Fa64, Fa82 and Fa100, respectively). All experiments were performed in the multi-anvil apparatus installed at NSLS beamline X17B2, to pressures up to about 7 GPa. Unit-cell volumes under hydrostatic conditions and differential stresses present in the samples were calculated using the method developed by Singh et al. (1998), and pressures measured using NaCl as a standard were then corrected for these stresses. Using a second-order Birch–Murnaghan equation of state, we obtained the isothermal bulk modulus of each composition: K T 0 Fa45 = 131 . 4 ± 2 . 6 GPa, K T 0 Fa64 = 132 . 1 ± 3 . 1 GPa, K T 0 Fa82 = 136 . 3 ± 1 . 7 GPa and K T 0 Fa100 = 134 . 8 ± 1 . 4 GPa. These values combined with data available in the literature show that the KT0 of Fe-rich olivines increases very slowly with the Fe content, but possibly not in a simple linear trend. |
| Databáze: | OpenAIRE |
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