New accurate compression data for γ-Fe2SiO4
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New accurate compression data for γ-Fe2SiO4. / Nestola, Fabrizio; Boffa-Ballaran, Tiziana; Koch-Müller, Monika; Balic Zunic, Tonci; Taran, Michael; Olsen, Lars Arnskov; Princivalle, Francesco; Secco, Luciano; Lundegaard, Lars.
In: Physics of the Earth and Planetary Interiors, Vol. 183, No. 3-4, 2010, p. 421-425.Research output: Contribution to journal › Journal article › Research › peer-review
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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
Y1 - 2010
N2 - The equation of state for ¿-Fe2SiO4 was determined by single-crystal X-ray diffraction up to 10.2 GPa 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 ¿-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 ¿-Fe2SiO4 up to the pressures of the Transition Zone. Due to the larger K' of ¿-Fe2SiO4, the difference in bulk sound velocity between the two end-members decreases with increasing pressure.
AB - The equation of state for ¿-Fe2SiO4 was determined by single-crystal X-ray diffraction up to 10.2 GPa 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 ¿-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 ¿-Fe2SiO4 up to the pressures of the Transition Zone. Due to the larger K' of ¿-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
VL - 183
SP - 421
EP - 425
JO - Physics of the Earth and Planetary Interiors
JF - Physics of the Earth and Planetary Interiors
SN - 0031-9201
IS - 3-4
ER -
ID: 34371655