Effect of Fe on the equation of state of mantle silicate perovskite over 1 Mbar

S. Lundin; K. Catalli; J. Santillán; S. H. Shim; V. B. Prakapenka; M. Kunz; Y. Meng

doi:10.1016/j.pepi.2008.05.002

Effect of Fe on the equation of state of mantle silicate perovskite over 1 Mbar

S. Lundin
, K. Catalli
, J. Santillán
, S. H. Shim
, V. B. Prakapenka
, M. Kunz
, Y. Meng

Research output: Contribution to journal › Article › peer-review

96 Scopus citations

Abstract

In order to investigate the effect of Fe on the equation of state (EOS), the volume of the perovskite (Pv) phases, (Mg_1-xFe_x)SiO₃, with different Fe contents (x = 0, 0.09, 0.15), has been measured at high pressures up to 1 Mbar in an Ar or NaCl medium. A bulk modulus (K₀) ranging between 255 and 261 GPa is obtained when the Au scales consistent with the Pt scale are used and the data are fit to the second order Birch-Murnaghan (BM) equation. When the third order BM equation is used, we obtain K₀ = 250-264 GPa and K₀^′ = 3.7-4.5, which is consistent with previous low-pressure X-ray diffraction and Brillouin measurements. Within experimental uncertainties (0.5% in volume and 6% in bulk modulus), we do not resolve differences in the EOS between Fe-bearing (up to 15%) and Fe-free Pv to 1 Mbar (2600-km depth in the mantle). This is in contrast with the much larger effect of the Fe spin transition for the EOS of ferropericlase (Fp) reported recently. This is perhaps due to much more diverse states of Fe (e.g., oxidation, coordination, and spin states) in Pv than in Fp.

Original language	English (US)
Pages (from-to)	97-102
Number of pages	6
Journal	Physics of the Earth and Planetary Interiors
Volume	168
Issue number	1-2
DOIs	https://doi.org/10.1016/j.pepi.2008.05.002
State	Published - May 2008
Externally published	Yes

Keywords

Equation of state
Mantle
Perovskite
Spin transition
X-ray diffraction

ASJC Scopus subject areas

Astronomy and Astrophysics
Geophysics
Physics and Astronomy (miscellaneous)
Space and Planetary Science

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10.1016/j.pepi.2008.05.002

Cite this

@article{917ddbdc6c91448ba2ef9694c528598a,

title = "Effect of Fe on the equation of state of mantle silicate perovskite over 1 Mbar",

abstract = "In order to investigate the effect of Fe on the equation of state (EOS), the volume of the perovskite (Pv) phases, (Mg1-xFex)SiO3, with different Fe contents (x = 0, 0.09, 0.15), has been measured at high pressures up to 1 Mbar in an Ar or NaCl medium. A bulk modulus (K0) ranging between 255 and 261 GPa is obtained when the Au scales consistent with the Pt scale are used and the data are fit to the second order Birch-Murnaghan (BM) equation. When the third order BM equation is used, we obtain K0 = 250-264 GPa and K0′ = 3.7-4.5, which is consistent with previous low-pressure X-ray diffraction and Brillouin measurements. Within experimental uncertainties (0.5\% in volume and 6\% in bulk modulus), we do not resolve differences in the EOS between Fe-bearing (up to 15\%) and Fe-free Pv to 1 Mbar (2600-km depth in the mantle). This is in contrast with the much larger effect of the Fe spin transition for the EOS of ferropericlase (Fp) reported recently. This is perhaps due to much more diverse states of Fe (e.g., oxidation, coordination, and spin states) in Pv than in Fp.",

keywords = "Equation of state, Mantle, Perovskite, Spin transition, X-ray diffraction",

author = "S. Lundin and K. Catalli and J. Santill{\'a}n and Shim, \{S. H.\} and Prakapenka, \{V. B.\} and M. Kunz and Y. Meng",

note = "Funding Information: The discussions with three anonymous reviewers have improved this paper. T.L. Grove provides the starting materials. N. Chatterjee assisted electron microprobe analysis of the starting materials. This work is partly supported by the National Science Foundation (NSF) to Shim (EAR0337005). Portions of this work were performed at the GSECARS and HPCAT sectors of APS, and beamline 12.2.2 of ALS. GSECARS is supported by the NSF and Department of Energy (DOE). HPCAT is supported by DOE-BES, DOE-NNSA, NSF, and the W.M. Keck Foundation. The 12.2.2 beamline is supported by the COMPRES under NSF. Use of APS and ALS is supported by the DOE.",

year = "2008",

month = may,

doi = "10.1016/j.pepi.2008.05.002",

language = "English (US)",

volume = "168",

pages = "97--102",

journal = "Physics of the Earth and Planetary Interiors",

issn = "0031-9201",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Effect of Fe on the equation of state of mantle silicate perovskite over 1 Mbar

AU - Lundin, S.

AU - Catalli, K.

AU - Santillán, J.

AU - Shim, S. H.

AU - Prakapenka, V. B.

AU - Kunz, M.

AU - Meng, Y.

N1 - Funding Information: The discussions with three anonymous reviewers have improved this paper. T.L. Grove provides the starting materials. N. Chatterjee assisted electron microprobe analysis of the starting materials. This work is partly supported by the National Science Foundation (NSF) to Shim (EAR0337005). Portions of this work were performed at the GSECARS and HPCAT sectors of APS, and beamline 12.2.2 of ALS. GSECARS is supported by the NSF and Department of Energy (DOE). HPCAT is supported by DOE-BES, DOE-NNSA, NSF, and the W.M. Keck Foundation. The 12.2.2 beamline is supported by the COMPRES under NSF. Use of APS and ALS is supported by the DOE.

PY - 2008/5

Y1 - 2008/5

N2 - In order to investigate the effect of Fe on the equation of state (EOS), the volume of the perovskite (Pv) phases, (Mg1-xFex)SiO3, with different Fe contents (x = 0, 0.09, 0.15), has been measured at high pressures up to 1 Mbar in an Ar or NaCl medium. A bulk modulus (K0) ranging between 255 and 261 GPa is obtained when the Au scales consistent with the Pt scale are used and the data are fit to the second order Birch-Murnaghan (BM) equation. When the third order BM equation is used, we obtain K0 = 250-264 GPa and K0′ = 3.7-4.5, which is consistent with previous low-pressure X-ray diffraction and Brillouin measurements. Within experimental uncertainties (0.5% in volume and 6% in bulk modulus), we do not resolve differences in the EOS between Fe-bearing (up to 15%) and Fe-free Pv to 1 Mbar (2600-km depth in the mantle). This is in contrast with the much larger effect of the Fe spin transition for the EOS of ferropericlase (Fp) reported recently. This is perhaps due to much more diverse states of Fe (e.g., oxidation, coordination, and spin states) in Pv than in Fp.

AB - In order to investigate the effect of Fe on the equation of state (EOS), the volume of the perovskite (Pv) phases, (Mg1-xFex)SiO3, with different Fe contents (x = 0, 0.09, 0.15), has been measured at high pressures up to 1 Mbar in an Ar or NaCl medium. A bulk modulus (K0) ranging between 255 and 261 GPa is obtained when the Au scales consistent with the Pt scale are used and the data are fit to the second order Birch-Murnaghan (BM) equation. When the third order BM equation is used, we obtain K0 = 250-264 GPa and K0′ = 3.7-4.5, which is consistent with previous low-pressure X-ray diffraction and Brillouin measurements. Within experimental uncertainties (0.5% in volume and 6% in bulk modulus), we do not resolve differences in the EOS between Fe-bearing (up to 15%) and Fe-free Pv to 1 Mbar (2600-km depth in the mantle). This is in contrast with the much larger effect of the Fe spin transition for the EOS of ferropericlase (Fp) reported recently. This is perhaps due to much more diverse states of Fe (e.g., oxidation, coordination, and spin states) in Pv than in Fp.

KW - Equation of state

KW - Mantle

KW - Perovskite

KW - Spin transition

KW - X-ray diffraction

UR - https://www.scopus.com/pages/publications/47049117549

UR - https://www.scopus.com/pages/publications/47049117549#tab=citedBy

U2 - 10.1016/j.pepi.2008.05.002

DO - 10.1016/j.pepi.2008.05.002

M3 - Article

AN - SCOPUS:47049117549

SN - 0031-9201

VL - 168

SP - 97

EP - 102

JO - Physics of the Earth and Planetary Interiors

JF - Physics of the Earth and Planetary Interiors

IS - 1-2

ER -

Effect of Fe on the equation of state of mantle silicate perovskite over 1 Mbar

Abstract

Keywords

ASJC Scopus subject areas

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