Pressure dependence of electrical conductivity of (Mg,Fe)SiO3 ilmenite

Tomoo Katsura; Sho Yokoshi; Kazuyuki Kawabe; Anton Shatskiy; Maki Okube; Hiroshi Fukui; Eiji Ito; Akifumi Nozawa; Ken Ichi Funakoshi

doi:10.1007/s00269-007-0143-0

Pressure dependence of electrical conductivity of (Mg,Fe)SiO₃ ilmenite

Tomoo Katsura, Sho Yokoshi, Kazuyuki Kawabe, Anton Shatskiy, Maki Okube, Hiroshi Fukui, Eiji Ito, Akifumi Nozawa, Ken Ichi Funakoshi

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

31 Citations (Scopus)

Abstract

The electrical conductivity of (Mg_0.93Fe_0.07) SiO₃ ilmenite was measured at temperatures of 500-1,200 K and pressures of 25-35 GPa in a Kawai-type multi-anvil apparatus equipped with sintered diamond anvils. In order to verify the reliability of this study, the electrical conductivity of (Mg_0.93Fe_0.07)SiO₃ perovskite was also measured at temperatures of 500-1,400 K and pressures of 30-35 GPa. The pressure calibration was carried out using in situ X-ray diffraction of MgO as pressure marker. The oxidation conditions of the samples were controlled by the Fe disk. The activation energy at zero pressure and activation volume for ilmenite are 0.82(6) eV and -1.5(2) cm³/ mol, respectively. Those for perovskite were 0.5(1) eV and -0.4(4) cm³/mol, respectively, which are in agreement with the experimental results reported previously. It is concluded that ilmenite conductivity has a large pressure dependence in the investigated P-T range.

Original language	English
Pages (from-to)	249-255
Number of pages	7
Journal	Physics and Chemistry of Minerals
Volume	34
Issue number	4
DOIs	https://doi.org/10.1007/s00269-007-0143-0
Publication status	Published - 2007 May
Externally published	Yes

Keywords

Activation volume
Electrical conductivity
Ilmenite
Pressure dependence

ASJC Scopus subject areas

Materials Science(all)
Geochemistry and Petrology

Access to Document

10.1007/s00269-007-0143-0

Cite this

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title = "Pressure dependence of electrical conductivity of (Mg,Fe)SiO3 ilmenite",

abstract = "The electrical conductivity of (Mg0.93Fe0.07) SiO3 ilmenite was measured at temperatures of 500-1,200 K and pressures of 25-35 GPa in a Kawai-type multi-anvil apparatus equipped with sintered diamond anvils. In order to verify the reliability of this study, the electrical conductivity of (Mg0.93Fe0.07)SiO3 perovskite was also measured at temperatures of 500-1,400 K and pressures of 30-35 GPa. The pressure calibration was carried out using in situ X-ray diffraction of MgO as pressure marker. The oxidation conditions of the samples were controlled by the Fe disk. The activation energy at zero pressure and activation volume for ilmenite are 0.82(6) eV and -1.5(2) cm3/ mol, respectively. Those for perovskite were 0.5(1) eV and -0.4(4) cm3/mol, respectively, which are in agreement with the experimental results reported previously. It is concluded that ilmenite conductivity has a large pressure dependence in the investigated P-T range.",

keywords = "Activation volume, Electrical conductivity, Ilmenite, Pressure dependence",

author = "Tomoo Katsura and Sho Yokoshi and Kazuyuki Kawabe and Anton Shatskiy and Maki Okube and Hiroshi Fukui and Eiji Ito and Akifumi Nozawa and Funakoshi, {Ken Ichi}",

year = "2007",

month = may,

doi = "10.1007/s00269-007-0143-0",

language = "English",

volume = "34",

pages = "249--255",

journal = "Physics and Chemistry of Minerals",

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publisher = "Springer Verlag",

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TY - JOUR

T1 - Pressure dependence of electrical conductivity of (Mg,Fe)SiO3 ilmenite

AU - Katsura, Tomoo

AU - Yokoshi, Sho

AU - Kawabe, Kazuyuki

AU - Shatskiy, Anton

AU - Okube, Maki

AU - Fukui, Hiroshi

AU - Ito, Eiji

AU - Nozawa, Akifumi

AU - Funakoshi, Ken Ichi

PY - 2007/5

Y1 - 2007/5

N2 - The electrical conductivity of (Mg0.93Fe0.07) SiO3 ilmenite was measured at temperatures of 500-1,200 K and pressures of 25-35 GPa in a Kawai-type multi-anvil apparatus equipped with sintered diamond anvils. In order to verify the reliability of this study, the electrical conductivity of (Mg0.93Fe0.07)SiO3 perovskite was also measured at temperatures of 500-1,400 K and pressures of 30-35 GPa. The pressure calibration was carried out using in situ X-ray diffraction of MgO as pressure marker. The oxidation conditions of the samples were controlled by the Fe disk. The activation energy at zero pressure and activation volume for ilmenite are 0.82(6) eV and -1.5(2) cm3/ mol, respectively. Those for perovskite were 0.5(1) eV and -0.4(4) cm3/mol, respectively, which are in agreement with the experimental results reported previously. It is concluded that ilmenite conductivity has a large pressure dependence in the investigated P-T range.

AB - The electrical conductivity of (Mg0.93Fe0.07) SiO3 ilmenite was measured at temperatures of 500-1,200 K and pressures of 25-35 GPa in a Kawai-type multi-anvil apparatus equipped with sintered diamond anvils. In order to verify the reliability of this study, the electrical conductivity of (Mg0.93Fe0.07)SiO3 perovskite was also measured at temperatures of 500-1,400 K and pressures of 30-35 GPa. The pressure calibration was carried out using in situ X-ray diffraction of MgO as pressure marker. The oxidation conditions of the samples were controlled by the Fe disk. The activation energy at zero pressure and activation volume for ilmenite are 0.82(6) eV and -1.5(2) cm3/ mol, respectively. Those for perovskite were 0.5(1) eV and -0.4(4) cm3/mol, respectively, which are in agreement with the experimental results reported previously. It is concluded that ilmenite conductivity has a large pressure dependence in the investigated P-T range.

KW - Activation volume

KW - Electrical conductivity

KW - Ilmenite

KW - Pressure dependence

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