New accurate compression data for γ-Fe2SiO4

Fabrizio Nestola; Tiziana Boffa-Ballaran; Monika Koch-Müller; Tonci Balic Zunic; Michael Taran; Lars Arnskov Olsen; Francesco Princivalle; Luciano Secco; Lars Lundegaard

doi:10.1016/j.pepi.2010.09.007

New accurate compression data for γ-Fe₂SiO₄

Fabrizio Nestola, Tiziana Boffa-Ballaran, Monika Koch-Müller, Tonci Balic Zunic, Michael Taran, Lars Arnskov Olsen, Francesco Princivalle, Luciano Secco, Lars Lundegaard

Geology

16 Citations (Scopus)

Abstract

The equation of state for γ-Fe₂SiO₄ was determined by single-crystal X-ray diffraction up to 10.2GPa at room temperature. The pressure-volume data, measured at 10 different pressures, do not show any evidence of a phase transformation and were fit by a third-order Birch-Murnaghan equation of state. The following coefficients were refined simultaneously: V₀=559.44(6)Å³, K_T0=187.3(1.7)GPa, and K'=5.5(4). This result implies that the Mg/Fe substitution along the γ-Fo-Fa join does not significantly affect the bulk modulus. The sample shows higher K' than other compositions along the Fo-Fa join, which generally have K'∼4. Based on our results we can calculate the sound bulk velocity of γ-Fe₂SiO₄ up to the pressures of the Transition Zone. Due to the larger K' of γ-Fe₂SiO₄, the difference in bulk sound velocity between the two end-members decreases with increasing pressure.

Original language	English
Journal	Physics of the Earth and Planetary Interiors
Volume	183
Issue number	3-4
Pages (from-to)	421-425
Number of pages	5
ISSN	0031-9201
DOIs	https://doi.org/10.1016/j.pepi.2010.09.007
Publication status	Published - 1 Dec 2010

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10.1016/j.pepi.2010.09.007

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@article{72904f31733b4bfbb1e95d4f870c5cd9,

title = "New accurate compression data for γ-Fe2SiO4",

abstract = "The equation of state for γ-Fe2SiO4 was determined by single-crystal X-ray diffraction up to 10.2GPa at room temperature. The pressure-volume data, measured at 10 different pressures, do not show any evidence of a phase transformation and were fit by a third-order Birch-Murnaghan equation of state. The following coefficients were refined simultaneously: V0=559.44(6){\AA}3, KT0=187.3(1.7)GPa, and K'=5.5(4). This result implies that the Mg/Fe substitution along the γ-Fo-Fa join does not significantly affect the bulk modulus. The sample shows higher K' than other compositions along the Fo-Fa join, which generally have K'∼4. Based on our results we can calculate the sound bulk velocity of γ-Fe2SiO4 up to the pressures of the Transition Zone. Due to the larger K' of γ-Fe2SiO4, the difference in bulk sound velocity between the two end-members decreases with increasing pressure.",

author = "Fabrizio Nestola and Tiziana Boffa-Ballaran and Monika Koch-M{\"u}ller and {Balic Zunic}, Tonci and Michael Taran and Olsen, {Lars Arnskov} and Francesco Princivalle and Luciano Secco and Lars Lundegaard",

year = "2010",

month = dec,

day = "1",

doi = "10.1016/j.pepi.2010.09.007",

language = "English",

volume = "183",

pages = "421--425",

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

issn = "0031-9201",

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TY - JOUR

T1 - New accurate compression data for γ-Fe2SiO4

AU - Nestola, Fabrizio

AU - Boffa-Ballaran, Tiziana

AU - Koch-Müller, Monika

AU - Balic Zunic, Tonci

AU - Taran, Michael

AU - Olsen, Lars Arnskov

AU - Princivalle, Francesco

AU - Secco, Luciano

AU - Lundegaard, Lars

PY - 2010/12/1

Y1 - 2010/12/1

N2 - The equation of state for γ-Fe2SiO4 was determined by single-crystal X-ray diffraction up to 10.2GPa at room temperature. The pressure-volume data, measured at 10 different pressures, do not show any evidence of a phase transformation and were fit by a third-order Birch-Murnaghan equation of state. The following coefficients were refined simultaneously: V0=559.44(6)Å3, KT0=187.3(1.7)GPa, and K'=5.5(4). This result implies that the Mg/Fe substitution along the γ-Fo-Fa join does not significantly affect the bulk modulus. The sample shows higher K' than other compositions along the Fo-Fa join, which generally have K'∼4. Based on our results we can calculate the sound bulk velocity of γ-Fe2SiO4 up to the pressures of the Transition Zone. Due to the larger K' of γ-Fe2SiO4, the difference in bulk sound velocity between the two end-members decreases with increasing pressure.

AB - The equation of state for γ-Fe2SiO4 was determined by single-crystal X-ray diffraction up to 10.2GPa at room temperature. The pressure-volume data, measured at 10 different pressures, do not show any evidence of a phase transformation and were fit by a third-order Birch-Murnaghan equation of state. The following coefficients were refined simultaneously: V0=559.44(6)Å3, KT0=187.3(1.7)GPa, and K'=5.5(4). This result implies that the Mg/Fe substitution along the γ-Fo-Fa join does not significantly affect the bulk modulus. The sample shows higher K' than other compositions along the Fo-Fa join, which generally have K'∼4. Based on our results we can calculate the sound bulk velocity of γ-Fe2SiO4 up to the pressures of the Transition Zone. Due to the larger K' of γ-Fe2SiO4, the difference in bulk sound velocity between the two end-members decreases with increasing pressure.

U2 - 10.1016/j.pepi.2010.09.007

DO - 10.1016/j.pepi.2010.09.007

M3 - Journal article

SN - 0031-9201

VL - 183

SP - 421

EP - 425

JO - Physics of the Earth and Planetary Interiors

JF - Physics of the Earth and Planetary Interiors

IS - 3-4

ER -

New accurate compression data for γ-Fe2SiO4

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New accurate compression data for γ-Fe₂SiO₄