On protons, iron and the high-pressure behavior of ringwoodite

Annette K. Kleppe; Andrew P. Jephcoat; Joseph R. Smyth; Daniel J. Frost

doi:10.1029/2002GL015276

On protons, iron and the high-pressure behavior of ringwoodite

Annette K. Kleppe, Andrew P. Jephcoat, Joseph R. Smyth, Daniel J. Frost

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

25 Citations (Scopus)

Abstract

Raman spectra of a single crystal of hydrous Fo₈₉- ringwoodite have been measured in a diamond-anvil cell at room temperature to 60 GPa. Strong peaks corresponding to asymmetric and symmetric stretching vibrations of the SiO₄ tetrahedra are observed at 796 and 841 cm^-1 respectively. Additional bands occur in the range 709-939 and 100-250 cm^-1. The SiO₄ stretching modes of the spinel structure shift continuously up to 60 GPa. Near 40 GPa new Raman bands emerge in the region 550-680 cm^-1 gaining intensity to the maximum pressure, a change that is reversible on pressure release. This pressure-induced modification in the structure appears to be related to structural complexity generated by both Fe and proton substitution.

Original language	English
Pages (from-to)	17-1-17-4
Journal	Geophysical Research Letters
Volume	29
Issue number	21
DOIs	https://doi.org/10.1029/2002GL015276
Publication status	Published - Nov 1 2002

ASJC Scopus subject areas

Geophysics
Earth and Planetary Sciences(all)

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abstract = "Raman spectra of a single crystal of hydrous Fo89- ringwoodite have been measured in a diamond-anvil cell at room temperature to 60 GPa. Strong peaks corresponding to asymmetric and symmetric stretching vibrations of the SiO4 tetrahedra are observed at 796 and 841 cm-1 respectively. Additional bands occur in the range 709-939 and 100-250 cm-1. The SiO4 stretching modes of the spinel structure shift continuously up to 60 GPa. Near 40 GPa new Raman bands emerge in the region 550-680 cm-1 gaining intensity to the maximum pressure, a change that is reversible on pressure release. This pressure-induced modification in the structure appears to be related to structural complexity generated by both Fe and proton substitution.",

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T1 - On protons, iron and the high-pressure behavior of ringwoodite

AU - Kleppe, Annette K.

AU - Jephcoat, Andrew P.

AU - Smyth, Joseph R.

AU - Frost, Daniel J.

PY - 2002/11/1

Y1 - 2002/11/1

N2 - Raman spectra of a single crystal of hydrous Fo89- ringwoodite have been measured in a diamond-anvil cell at room temperature to 60 GPa. Strong peaks corresponding to asymmetric and symmetric stretching vibrations of the SiO4 tetrahedra are observed at 796 and 841 cm-1 respectively. Additional bands occur in the range 709-939 and 100-250 cm-1. The SiO4 stretching modes of the spinel structure shift continuously up to 60 GPa. Near 40 GPa new Raman bands emerge in the region 550-680 cm-1 gaining intensity to the maximum pressure, a change that is reversible on pressure release. This pressure-induced modification in the structure appears to be related to structural complexity generated by both Fe and proton substitution.

AB - Raman spectra of a single crystal of hydrous Fo89- ringwoodite have been measured in a diamond-anvil cell at room temperature to 60 GPa. Strong peaks corresponding to asymmetric and symmetric stretching vibrations of the SiO4 tetrahedra are observed at 796 and 841 cm-1 respectively. Additional bands occur in the range 709-939 and 100-250 cm-1. The SiO4 stretching modes of the spinel structure shift continuously up to 60 GPa. Near 40 GPa new Raman bands emerge in the region 550-680 cm-1 gaining intensity to the maximum pressure, a change that is reversible on pressure release. This pressure-induced modification in the structure appears to be related to structural complexity generated by both Fe and proton substitution.

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On protons, iron and the high-pressure behavior of ringwoodite

Abstract

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