In Situ X Ray Observation of the Phase Transitions from α to γ and from γ to Perovskite+Periclase in Mg2SiO4

T. Kato; T. Kubo; H. Morishima; E. Ohtani; A. Suzuki; D. Yamazaki; K. Mibe; T. Kikegawa; O. Shimomura

doi:10.4131/jshpreview.7.119

In Situ X Ray Observation of the Phase Transitions from α to γ and from γ to Perovskite+Periclase in Mg₂SiO₄

T. Kato, T. Kubo, H. Morishima, E. Ohtani, A. Suzuki, D. Yamazaki, K. Mibe, T. Kikegawa, O. Shimomura

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

5 Citations (Scopus)

Abstract

In situ X-ray observation has been made on Mg_sSiO₄ forsterite in the pressure ranges over 250–30 GPa and 1250°C, using double stage multianvil system with sintered diamond anvil window and intense X-rays from synchrotm radiation. Forsterite (α-phase) transfomed into spinel (γ-phase) at 28 GPa and 800αC in the frist heating cycles of the two runs. Spinel transformed into the assemblage of perovskite and periclase in the second heating cycless at 26.4 GPa and 1200°C and at 28.5 GPa and 950°C. The results show that α-γ transition can proceed outside the stability field of spinel, and that the blocking temperature, above which the stable assmblage of perovskite and periclase can be formed, has a pressure dependence.

Original language	English
Pages (from-to)	119-121
Number of pages	3
Journal	Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu
Volume	7
DOIs	https://doi.org/10.4131/jshpreview.7.119
Publication status	Published - 1998
Externally published	Yes

Keywords

Earth material
Kinetics
Phase relation
Phase transition mechanism
Synchrotron X-ray

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

Access to Document

10.4131/jshpreview.7.119

Cite this

@article{39489c6623ef4556bbe0703fd6887561,

title = "In Situ X Ray Observation of the Phase Transitions from α to γ and from γ to Perovskite+Periclase in Mg2SiO4",

abstract = "In situ X-ray observation has been made on MgsSiO4 forsterite in the pressure ranges over 250–30 GPa and 1250°C, using double stage multianvil system with sintered diamond anvil window and intense X-rays from synchrotm radiation. Forsterite (α-phase) transfomed into spinel (γ-phase) at 28 GPa and 800αC in the frist heating cycles of the two runs. Spinel transformed into the assemblage of perovskite and periclase in the second heating cycless at 26.4 GPa and 1200°C and at 28.5 GPa and 950°C. The results show that α-γ transition can proceed outside the stability field of spinel, and that the blocking temperature, above which the stable assmblage of perovskite and periclase can be formed, has a pressure dependence.",

keywords = "Earth material, Kinetics, Phase relation, Phase transition mechanism, Synchrotron X-ray",

author = "T. Kato and T. Kubo and H. Morishima and E. Ohtani and A. Suzuki and D. Yamazaki and K. Mibe and T. Kikegawa and O. Shimomura",

year = "1998",

doi = "10.4131/jshpreview.7.119",

language = "English",

volume = "7",

pages = "119--121",

journal = "Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu",

issn = "0917-639X",

publisher = "Japan Society of High Pressure Science and Technology",

}

TY - JOUR

T1 - In Situ X Ray Observation of the Phase Transitions from α to γ and from γ to Perovskite+Periclase in Mg2SiO4

AU - Kato, T.

AU - Kubo, T.

AU - Morishima, H.

AU - Ohtani, E.

AU - Suzuki, A.

AU - Yamazaki, D.

AU - Mibe, K.

AU - Kikegawa, T.

AU - Shimomura, O.

PY - 1998

Y1 - 1998

N2 - In situ X-ray observation has been made on MgsSiO4 forsterite in the pressure ranges over 250–30 GPa and 1250°C, using double stage multianvil system with sintered diamond anvil window and intense X-rays from synchrotm radiation. Forsterite (α-phase) transfomed into spinel (γ-phase) at 28 GPa and 800αC in the frist heating cycles of the two runs. Spinel transformed into the assemblage of perovskite and periclase in the second heating cycless at 26.4 GPa and 1200°C and at 28.5 GPa and 950°C. The results show that α-γ transition can proceed outside the stability field of spinel, and that the blocking temperature, above which the stable assmblage of perovskite and periclase can be formed, has a pressure dependence.

AB - In situ X-ray observation has been made on MgsSiO4 forsterite in the pressure ranges over 250–30 GPa and 1250°C, using double stage multianvil system with sintered diamond anvil window and intense X-rays from synchrotm radiation. Forsterite (α-phase) transfomed into spinel (γ-phase) at 28 GPa and 800αC in the frist heating cycles of the two runs. Spinel transformed into the assemblage of perovskite and periclase in the second heating cycless at 26.4 GPa and 1200°C and at 28.5 GPa and 950°C. The results show that α-γ transition can proceed outside the stability field of spinel, and that the blocking temperature, above which the stable assmblage of perovskite and periclase can be formed, has a pressure dependence.

KW - Earth material

KW - Kinetics

KW - Phase relation

KW - Phase transition mechanism

KW - Synchrotron X-ray

UR - http://www.scopus.com/inward/record.url?scp=0000798394&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000798394&partnerID=8YFLogxK

U2 - 10.4131/jshpreview.7.119

DO - 10.4131/jshpreview.7.119

M3 - Article

AN - SCOPUS:0000798394

SN - 0917-639X

VL - 7

SP - 119

EP - 121

JO - Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu

JF - Review of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu

ER -