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X-ray diffraction and Mössbauer spectroscopy of Fe3+-bearing Mg-silicate post-perovskite at 128–138 GPa

  • K. Catalli EMAIL logo , S.-H. Shim , V.B. Prakapenka , J. Zhao and W. Sturhahn
Published/Copyright: April 2, 2015
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American Mineralogist
From the journal American Mineralogist Volume 95 Issue 2-3

Abstract

The effect of ferric iron on the properties of Mg-silicate post-perovskite (PPv) were studied up to 138 GPa using synchrotron X-ray diffraction and Mössbauer spectroscopy. Our diffraction measurements revealed that the incorporation of Fe3+ has virtually no effect on the volume of PPv, in contrast to Fe2+, which increases the volume. Therefore, incorporation of Fe3+ increases the density of PPv much more effectively than Fe2+. Mössbauer spectroscopy suggests that Fe3+ enters PPv through chargecoupled substitution and is high spin in the bipolar prismatic site and low spin in the octahedral site (i.e., mixed spin state). Our results may have important implications for the gravitational stability of lower-mantle heterogeneities.

Keywords: Post-perovskite; spin state of iron; ferric iron; X-ray diffraction; Mössbauer spectroscopy
Received: 2009-7-17
Accepted: 2009-10-15
Published Online: 2015-4-2
Published in Print: 2010-2-1

© 2015 by Walter de Gruyter Berlin/Boston

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  5. Chopinite-sarcopside solid solution, [(Mg,Fe)3□](PO4)2, in GRA95209, a transitional acapulcoite: Implications for phosphate genesis in meteorites
  6. Distribution of rare earth elements in lunar zircon
  7. Methodological re-evaluation of the electrical conductivity of silicate melts
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  10. Location and quantification of hydroxyl in wadsleyite: New insights
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  15. REE diffusion in olivine
  16. Phase transition induced by solid solution: The BCa-BMg substitution in richteritic amphiboles
  17. Aiolosite, Na2(Na2Bi)(SO4)3Cl, a new sulfate isotypic to apatite from La Fossa Crater, Vulcano, Aeolian Islands, Italy
  18. Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
  19. Galliskiite, Ca4Al2(PO4)2F8·5H2O, a new mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
  20. Description and crystal structure of liversidgeite, Zn6(PO4)4·7H2O, a new mineral from Broken Hill, New South Wales, Australia
  21. Evidence of dmisteinbergite (hexagonal form of CaAl2Si2O8) in pseudotachylyte: A tool to constrain the thermal history of a seismic event
  22. Partitioning of Eu between augite and a highly spiked martian basalt composition as a function of oxygen fugacity (IW-1 to QFM): Determination of Eu2+/Eu3+ ratios by XANES
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  24. X-ray diffraction and Mössbauer spectroscopy of Fe3+-bearing Mg-silicate post-perovskite at 128–138 GPa
https://doi.org/10.2138/am.2010.3352
Keywords for this article
Post-perovskite; spin state of iron; ferric iron; X-ray diffraction; Mössbauer spectroscopy

Articles in the same Issue

  1. Brownleeite: A new manganese silicide mineral in an interplanetary dust particle
  2. Simulation of thermodynamic mixing properties of actinide-containing zircon solid solutions
  3. Multilevel modular mesocrystalline organization in red coral
  4. High-pressure behavior of 2M1 muscovite
  5. Chopinite-sarcopside solid solution, [(Mg,Fe)3□](PO4)2, in GRA95209, a transitional acapulcoite: Implications for phosphate genesis in meteorites
  6. Distribution of rare earth elements in lunar zircon
  7. Methodological re-evaluation of the electrical conductivity of silicate melts
  8. Site-specific infrared O-H absorption coefficients for water substitution into olivine
  9. High-pressure phase transition of a natural pigeonite
  10. Location and quantification of hydroxyl in wadsleyite: New insights
  11. Optical spectroscopic study of natural Fe-rich Pizzo Forno staurolite at different temperatures and pressures
  12. Metasideronatrite: Crystal structure and its relation with sideronatrite
  13. Optical absorption, luminescence, and electron paramagnetic resonance (EPR) spectroscopy of crystalline to metamict zircon: Evidence for formation of uranyl, manganese, and other optically active centers
  14. Factors responsible for crystal-chemical variations in the solid solutions from illite to aluminoceladonite and from glauconite to celadonite
  15. REE diffusion in olivine
  16. Phase transition induced by solid solution: The BCa-BMg substitution in richteritic amphiboles
  17. Aiolosite, Na2(Na2Bi)(SO4)3Cl, a new sulfate isotypic to apatite from La Fossa Crater, Vulcano, Aeolian Islands, Italy
  18. Gayite, a new dufrénite-group mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
  19. Galliskiite, Ca4Al2(PO4)2F8·5H2O, a new mineral from the Gigante granitic pegmatite, Córdoba province, Argentina
  20. Description and crystal structure of liversidgeite, Zn6(PO4)4·7H2O, a new mineral from Broken Hill, New South Wales, Australia
  21. Evidence of dmisteinbergite (hexagonal form of CaAl2Si2O8) in pseudotachylyte: A tool to constrain the thermal history of a seismic event
  22. Partitioning of Eu between augite and a highly spiked martian basalt composition as a function of oxygen fugacity (IW-1 to QFM): Determination of Eu2+/Eu3+ ratios by XANES
  23. Density functional calculation of the infrared spectrum of surface hydroxyl groups on goethite (α-FeOOH)
  24. X-ray diffraction and Mössbauer spectroscopy of Fe3+-bearing Mg-silicate post-perovskite at 128–138 GPa
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