Silicon self-diffusion in MgSiO3 perovskite at 25 GPa

Daisuke Yamazaki, Takumi Kato, Hisayoshi Yurimoto, Eiji Ohtani, Mitsuhiro Toriumi

Research output: Contribution to journalArticle

84 Citations (Scopus)

Abstract

Silicon self-diffusion coefficients in MgSiO3 perovskite were measured under lower mantle conditions. The MgSiO3 perovskite was synthesized and diffusion annealing experiments were conducted at pressure of 25 GPa and temperature of 1673-2073 K using a MA8 type high-pressure apparatus. The diffusion profiles were obtained by secondary ion mass spectrometry. The lattice and grain boundary diffusion coefficients (D1 and D(gb)) were determined to be D1 [m2/s] = 2.74 X 10-10 exp(-336 [kJ/mol]/RT) and δD(gb) [m3/s] = 7.12 X 10-17 exp(-311 [kJ/mol]/RT), respectively, where δ is the width of grain boundary, R is the gas constant and T is the absolute temperature. These diffusion coefficient play a key role for understanding the rheology of the lower mantle. (C) 2000 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Pages (from-to)299-309
Number of pages11
JournalPhysics of the Earth and Planetary Interiors
Volume119
Issue number3-4
DOIs
Publication statusPublished - May 2000
Externally publishedYes

Fingerprint

perovskite
silicon
diffusion coefficient
Earth mantle
grain boundaries
lower mantle
grain boundary
rheology
secondary ion mass spectrometry
annealing
temperature
profiles
gases
mass spectrometry
ion
gas
experiment

Keywords

  • High pressure and temperature
  • MgSiO perovskite
  • Rheology of the lower mantle
  • Silicon diffusion profile

ASJC Scopus subject areas

  • Geophysics
  • Space and Planetary Science

Cite this

Silicon self-diffusion in MgSiO3 perovskite at 25 GPa. / Yamazaki, Daisuke; Kato, Takumi; Yurimoto, Hisayoshi; Ohtani, Eiji; Toriumi, Mitsuhiro.

In: Physics of the Earth and Planetary Interiors, Vol. 119, No. 3-4, 05.2000, p. 299-309.

Research output: Contribution to journalArticle

Yamazaki, Daisuke ; Kato, Takumi ; Yurimoto, Hisayoshi ; Ohtani, Eiji ; Toriumi, Mitsuhiro. / Silicon self-diffusion in MgSiO3 perovskite at 25 GPa. In: Physics of the Earth and Planetary Interiors. 2000 ; Vol. 119, No. 3-4. pp. 299-309.
@article{0074f7d11ffc4766a1fd1128179d8b14,
title = "Silicon self-diffusion in MgSiO3 perovskite at 25 GPa",
abstract = "Silicon self-diffusion coefficients in MgSiO3 perovskite were measured under lower mantle conditions. The MgSiO3 perovskite was synthesized and diffusion annealing experiments were conducted at pressure of 25 GPa and temperature of 1673-2073 K using a MA8 type high-pressure apparatus. The diffusion profiles were obtained by secondary ion mass spectrometry. The lattice and grain boundary diffusion coefficients (D1 and D(gb)) were determined to be D1 [m2/s] = 2.74 X 10-10 exp(-336 [kJ/mol]/RT) and δD(gb) [m3/s] = 7.12 X 10-17 exp(-311 [kJ/mol]/RT), respectively, where δ is the width of grain boundary, R is the gas constant and T is the absolute temperature. These diffusion coefficient play a key role for understanding the rheology of the lower mantle. (C) 2000 Elsevier Science B.V. All rights reserved.",
keywords = "High pressure and temperature, MgSiO perovskite, Rheology of the lower mantle, Silicon diffusion profile",
author = "Daisuke Yamazaki and Takumi Kato and Hisayoshi Yurimoto and Eiji Ohtani and Mitsuhiro Toriumi",
year = "2000",
month = "5",
doi = "10.1016/S0031-9201(00)00135-7",
language = "English",
volume = "119",
pages = "299--309",
journal = "Physics of the Earth and Planetary Interiors",
issn = "0031-9201",
publisher = "Elsevier",
number = "3-4",

}

TY - JOUR

T1 - Silicon self-diffusion in MgSiO3 perovskite at 25 GPa

AU - Yamazaki, Daisuke

AU - Kato, Takumi

AU - Yurimoto, Hisayoshi

AU - Ohtani, Eiji

AU - Toriumi, Mitsuhiro

PY - 2000/5

Y1 - 2000/5

N2 - Silicon self-diffusion coefficients in MgSiO3 perovskite were measured under lower mantle conditions. The MgSiO3 perovskite was synthesized and diffusion annealing experiments were conducted at pressure of 25 GPa and temperature of 1673-2073 K using a MA8 type high-pressure apparatus. The diffusion profiles were obtained by secondary ion mass spectrometry. The lattice and grain boundary diffusion coefficients (D1 and D(gb)) were determined to be D1 [m2/s] = 2.74 X 10-10 exp(-336 [kJ/mol]/RT) and δD(gb) [m3/s] = 7.12 X 10-17 exp(-311 [kJ/mol]/RT), respectively, where δ is the width of grain boundary, R is the gas constant and T is the absolute temperature. These diffusion coefficient play a key role for understanding the rheology of the lower mantle. (C) 2000 Elsevier Science B.V. All rights reserved.

AB - Silicon self-diffusion coefficients in MgSiO3 perovskite were measured under lower mantle conditions. The MgSiO3 perovskite was synthesized and diffusion annealing experiments were conducted at pressure of 25 GPa and temperature of 1673-2073 K using a MA8 type high-pressure apparatus. The diffusion profiles were obtained by secondary ion mass spectrometry. The lattice and grain boundary diffusion coefficients (D1 and D(gb)) were determined to be D1 [m2/s] = 2.74 X 10-10 exp(-336 [kJ/mol]/RT) and δD(gb) [m3/s] = 7.12 X 10-17 exp(-311 [kJ/mol]/RT), respectively, where δ is the width of grain boundary, R is the gas constant and T is the absolute temperature. These diffusion coefficient play a key role for understanding the rheology of the lower mantle. (C) 2000 Elsevier Science B.V. All rights reserved.

KW - High pressure and temperature

KW - MgSiO perovskite

KW - Rheology of the lower mantle

KW - Silicon diffusion profile

UR - http://www.scopus.com/inward/record.url?scp=0034086216&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034086216&partnerID=8YFLogxK

U2 - 10.1016/S0031-9201(00)00135-7

DO - 10.1016/S0031-9201(00)00135-7

M3 - Article

VL - 119

SP - 299

EP - 309

JO - Physics of the Earth and Planetary Interiors

JF - Physics of the Earth and Planetary Interiors

SN - 0031-9201

IS - 3-4

ER -