Raman spectroscopy of CaIrO3 postperovskite up to 30 GPa

Justin Hustoft, Sang-Heon Shim, Atsushi Kubo, Norimasa Nishiyama

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We have measured Raman spectra of the postperovskite (PPv) phase in CaIrO3 up to 30 GPa to constrain the Grüneisen parameter (γ). We identified a total of 4 strong modes between 200 and 650 cm-1, which is in contrast with the Raman spectra of Mn2O3 and MgGeO3-PPV where at least nine different modes have been detected. We found no sign of a phase transition in the Raman spectra of PPvCaIrO3,which supports the stability of the PPv phase up to 30 GPa and room temperature in CaIrO3. The spectroscopic Grüneisen parameter γsp.0 = 1.66-1.72, constrained from our Raman data, is in excellent agreement with the thermodynamic Grüneisen parameter, γth.0 = 1.75 ± 0.05, calculated from recent XRD measurements (Martin et al. 2007) on CaIrO3-PPv synthesized at high pressure and temperature similar to our starting material. Our result suggests that γsp constrained by Raman measurements provides a reasonable estimate on the γth of the PPv phase in CaIrO3.

Original languageEnglish (US)
Pages (from-to)1654-1658
Number of pages5
JournalAmerican Mineralogist
Volume93
Issue number10
DOIs
StatePublished - Oct 2008
Externally publishedYes

Fingerprint

Raman spectroscopy
Raman scattering
Raman spectra
phase transition
thermodynamics
Phase transitions
X-ray diffraction
Thermodynamics
Temperature
room temperature
estimates
parameter
temperature

Keywords

  • CaIrO
  • Gruneisen parameter
  • Postperovskite
  • Raman sepctroscopy
  • Thermal equation of state

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Raman spectroscopy of CaIrO3 postperovskite up to 30 GPa. / Hustoft, Justin; Shim, Sang-Heon; Kubo, Atsushi; Nishiyama, Norimasa.

In: American Mineralogist, Vol. 93, No. 10, 10.2008, p. 1654-1658.

Research output: Contribution to journalArticle

Hustoft, Justin ; Shim, Sang-Heon ; Kubo, Atsushi ; Nishiyama, Norimasa. / Raman spectroscopy of CaIrO3 postperovskite up to 30 GPa. In: American Mineralogist. 2008 ; Vol. 93, No. 10. pp. 1654-1658.
@article{fed78f5f494c4bff9d26407ad13979ce,
title = "Raman spectroscopy of CaIrO3 postperovskite up to 30 GPa",
abstract = "We have measured Raman spectra of the postperovskite (PPv) phase in CaIrO3 up to 30 GPa to constrain the Gr{\"u}neisen parameter (γ). We identified a total of 4 strong modes between 200 and 650 cm-1, which is in contrast with the Raman spectra of Mn2O3 and MgGeO3-PPV where at least nine different modes have been detected. We found no sign of a phase transition in the Raman spectra of PPvCaIrO3,which supports the stability of the PPv phase up to 30 GPa and room temperature in CaIrO3. The spectroscopic Gr{\"u}neisen parameter γsp.0 = 1.66-1.72, constrained from our Raman data, is in excellent agreement with the thermodynamic Gr{\"u}neisen parameter, γth.0 = 1.75 ± 0.05, calculated from recent XRD measurements (Martin et al. 2007) on CaIrO3-PPv synthesized at high pressure and temperature similar to our starting material. Our result suggests that γsp constrained by Raman measurements provides a reasonable estimate on the γth of the PPv phase in CaIrO3.",
keywords = "CaIrO, Gruneisen parameter, Postperovskite, Raman sepctroscopy, Thermal equation of state",
author = "Justin Hustoft and Sang-Heon Shim and Atsushi Kubo and Norimasa Nishiyama",
year = "2008",
month = "10",
doi = "10.2138/am.2008.2938",
language = "English (US)",
volume = "93",
pages = "1654--1658",
journal = "American Mineralogist",
issn = "0003-004X",
publisher = "Mineralogical Society of America",
number = "10",

}

TY - JOUR

T1 - Raman spectroscopy of CaIrO3 postperovskite up to 30 GPa

AU - Hustoft, Justin

AU - Shim, Sang-Heon

AU - Kubo, Atsushi

AU - Nishiyama, Norimasa

PY - 2008/10

Y1 - 2008/10

N2 - We have measured Raman spectra of the postperovskite (PPv) phase in CaIrO3 up to 30 GPa to constrain the Grüneisen parameter (γ). We identified a total of 4 strong modes between 200 and 650 cm-1, which is in contrast with the Raman spectra of Mn2O3 and MgGeO3-PPV where at least nine different modes have been detected. We found no sign of a phase transition in the Raman spectra of PPvCaIrO3,which supports the stability of the PPv phase up to 30 GPa and room temperature in CaIrO3. The spectroscopic Grüneisen parameter γsp.0 = 1.66-1.72, constrained from our Raman data, is in excellent agreement with the thermodynamic Grüneisen parameter, γth.0 = 1.75 ± 0.05, calculated from recent XRD measurements (Martin et al. 2007) on CaIrO3-PPv synthesized at high pressure and temperature similar to our starting material. Our result suggests that γsp constrained by Raman measurements provides a reasonable estimate on the γth of the PPv phase in CaIrO3.

AB - We have measured Raman spectra of the postperovskite (PPv) phase in CaIrO3 up to 30 GPa to constrain the Grüneisen parameter (γ). We identified a total of 4 strong modes between 200 and 650 cm-1, which is in contrast with the Raman spectra of Mn2O3 and MgGeO3-PPV where at least nine different modes have been detected. We found no sign of a phase transition in the Raman spectra of PPvCaIrO3,which supports the stability of the PPv phase up to 30 GPa and room temperature in CaIrO3. The spectroscopic Grüneisen parameter γsp.0 = 1.66-1.72, constrained from our Raman data, is in excellent agreement with the thermodynamic Grüneisen parameter, γth.0 = 1.75 ± 0.05, calculated from recent XRD measurements (Martin et al. 2007) on CaIrO3-PPv synthesized at high pressure and temperature similar to our starting material. Our result suggests that γsp constrained by Raman measurements provides a reasonable estimate on the γth of the PPv phase in CaIrO3.

KW - CaIrO

KW - Gruneisen parameter

KW - Postperovskite

KW - Raman sepctroscopy

KW - Thermal equation of state

UR - http://www.scopus.com/inward/record.url?scp=56449122871&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=56449122871&partnerID=8YFLogxK

U2 - 10.2138/am.2008.2938

DO - 10.2138/am.2008.2938

M3 - Article

AN - SCOPUS:56449122871

VL - 93

SP - 1654

EP - 1658

JO - American Mineralogist

JF - American Mineralogist

SN - 0003-004X

IS - 10

ER -