High-pressure behavior of MnGeO3 and CdGeO3 perovskites and the post-perovskite phase transition

Shigehiko Tateno, Kei Hirose, Nagayoshi Sata, Yasuo Ohishi

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

The stability and high-pressure behavior of perovskite structure in MnGeO3 and CdGeO3 were examined on the basis of in situ synchrotron X-ray diffraction measurements at high pressure and temperature in a laser-heated diamond-anvil cell. Results demonstrate that the structural distortion of orthorhombic MnGeO3 perovskite is enhanced with increasing pressure and it undergoes phase transition to a CaIrO3-type post-perovskite structure above 60 GPa at 1,800 K. A molar volume of the post-perovskite phase is smaller by 1.6% than that of perovskite at equivalent pressure. In contrast, the structure of CdGeO3 perovskite becomes less distorted from the ideal cubic perovskite structure with increasing pressure, and it is stable even at 110 GPa and 2,000 K. These results suggest that the phase transition to post-perovskite is induced by a large distortion of perovskite structure with increasing pressure.

Original languageEnglish
Pages (from-to)721-725
Number of pages5
JournalPhysics and Chemistry of Minerals
Volume32
Issue number10
DOIs
Publication statusPublished - Jan 2006
Externally publishedYes

Fingerprint

perovskite
phase transition
Perovskite
Phase transitions
diamond anvil cell
Diamond
Synchrotrons
Density (specific gravity)
Diamonds
laser
X-ray diffraction
X ray diffraction
Lasers

Keywords

  • Diamond-anvil cell
  • High-pressureexperiment
  • Perovskite
  • Phasetransition
  • Post-perovskite

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Materials Science(all)

Cite this

High-pressure behavior of MnGeO3 and CdGeO3 perovskites and the post-perovskite phase transition. / Tateno, Shigehiko; Hirose, Kei; Sata, Nagayoshi; Ohishi, Yasuo.

In: Physics and Chemistry of Minerals, Vol. 32, No. 10, 01.2006, p. 721-725.

Research output: Contribution to journalArticle

Tateno, Shigehiko ; Hirose, Kei ; Sata, Nagayoshi ; Ohishi, Yasuo. / High-pressure behavior of MnGeO3 and CdGeO3 perovskites and the post-perovskite phase transition. In: Physics and Chemistry of Minerals. 2006 ; Vol. 32, No. 10. pp. 721-725.
@article{aa5f4e4e6170408ba94702cc43aecfe7,
title = "High-pressure behavior of MnGeO3 and CdGeO3 perovskites and the post-perovskite phase transition",
abstract = "The stability and high-pressure behavior of perovskite structure in MnGeO3 and CdGeO3 were examined on the basis of in situ synchrotron X-ray diffraction measurements at high pressure and temperature in a laser-heated diamond-anvil cell. Results demonstrate that the structural distortion of orthorhombic MnGeO3 perovskite is enhanced with increasing pressure and it undergoes phase transition to a CaIrO3-type post-perovskite structure above 60 GPa at 1,800 K. A molar volume of the post-perovskite phase is smaller by 1.6{\%} than that of perovskite at equivalent pressure. In contrast, the structure of CdGeO3 perovskite becomes less distorted from the ideal cubic perovskite structure with increasing pressure, and it is stable even at 110 GPa and 2,000 K. These results suggest that the phase transition to post-perovskite is induced by a large distortion of perovskite structure with increasing pressure.",
keywords = "Diamond-anvil cell, High-pressureexperiment, Perovskite, Phasetransition, Post-perovskite",
author = "Shigehiko Tateno and Kei Hirose and Nagayoshi Sata and Yasuo Ohishi",
year = "2006",
month = "1",
doi = "10.1007/s00269-005-0049-7",
language = "English",
volume = "32",
pages = "721--725",
journal = "Physics and Chemistry of Minerals",
issn = "0342-1791",
publisher = "Springer Verlag",
number = "10",

}

TY - JOUR

T1 - High-pressure behavior of MnGeO3 and CdGeO3 perovskites and the post-perovskite phase transition

AU - Tateno, Shigehiko

AU - Hirose, Kei

AU - Sata, Nagayoshi

AU - Ohishi, Yasuo

PY - 2006/1

Y1 - 2006/1

N2 - The stability and high-pressure behavior of perovskite structure in MnGeO3 and CdGeO3 were examined on the basis of in situ synchrotron X-ray diffraction measurements at high pressure and temperature in a laser-heated diamond-anvil cell. Results demonstrate that the structural distortion of orthorhombic MnGeO3 perovskite is enhanced with increasing pressure and it undergoes phase transition to a CaIrO3-type post-perovskite structure above 60 GPa at 1,800 K. A molar volume of the post-perovskite phase is smaller by 1.6% than that of perovskite at equivalent pressure. In contrast, the structure of CdGeO3 perovskite becomes less distorted from the ideal cubic perovskite structure with increasing pressure, and it is stable even at 110 GPa and 2,000 K. These results suggest that the phase transition to post-perovskite is induced by a large distortion of perovskite structure with increasing pressure.

AB - The stability and high-pressure behavior of perovskite structure in MnGeO3 and CdGeO3 were examined on the basis of in situ synchrotron X-ray diffraction measurements at high pressure and temperature in a laser-heated diamond-anvil cell. Results demonstrate that the structural distortion of orthorhombic MnGeO3 perovskite is enhanced with increasing pressure and it undergoes phase transition to a CaIrO3-type post-perovskite structure above 60 GPa at 1,800 K. A molar volume of the post-perovskite phase is smaller by 1.6% than that of perovskite at equivalent pressure. In contrast, the structure of CdGeO3 perovskite becomes less distorted from the ideal cubic perovskite structure with increasing pressure, and it is stable even at 110 GPa and 2,000 K. These results suggest that the phase transition to post-perovskite is induced by a large distortion of perovskite structure with increasing pressure.

KW - Diamond-anvil cell

KW - High-pressureexperiment

KW - Perovskite

KW - Phasetransition

KW - Post-perovskite

UR - http://www.scopus.com/inward/record.url?scp=31344468016&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=31344468016&partnerID=8YFLogxK

U2 - 10.1007/s00269-005-0049-7

DO - 10.1007/s00269-005-0049-7

M3 - Article

AN - SCOPUS:31344468016

VL - 32

SP - 721

EP - 725

JO - Physics and Chemistry of Minerals

JF - Physics and Chemistry of Minerals

SN - 0342-1791

IS - 10

ER -