High-temperature behavior of metastable MgSiO3 perovskite: a Raman spectroscopic study

D. J. Durben; George Wolf

High-temperature behavior of metastable MgSiO₃ perovskite: a Raman spectroscopic study

D. J. Durben
, George Wolf

Molecular Sciences, School of (SMS)

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

80 Scopus citations

Abstract

The thermal behavior of metastable magnesium silicate (MgSiO₃) perovskite has been investigated with Raman spectroscopy at ambient pressure. No evidence for previously predicted high-temperature crystal phase transformations or soft mode behavior is observed. Thermally induced vitrification of the perovskite to an amorphous phase with Si in tetrahedral coordination begins near 400 K and is complete by 750 K. Irreversible frequency shifts of the perovskite Raman bands accompany the vitrification. Residual Raman shifts of samples thermally cycled into the vitrification region indicate a contraction of the perovskite lattice of up to 0.5% in volume. -from Authors

Original language	English (US)
Pages (from-to)	890-893
Number of pages	4
Journal	American Mineralogist
Volume	77
Issue number	7-8
State	Published - 1992

ASJC Scopus subject areas

Geophysics
Geochemistry and Petrology

Cite this

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title = "High-temperature behavior of metastable MgSiO3 perovskite: a Raman spectroscopic study",

abstract = "The thermal behavior of metastable magnesium silicate (MgSiO3) perovskite has been investigated with Raman spectroscopy at ambient pressure. No evidence for previously predicted high-temperature crystal phase transformations or soft mode behavior is observed. Thermally induced vitrification of the perovskite to an amorphous phase with Si in tetrahedral coordination begins near 400 K and is complete by 750 K. Irreversible frequency shifts of the perovskite Raman bands accompany the vitrification. Residual Raman shifts of samples thermally cycled into the vitrification region indicate a contraction of the perovskite lattice of up to 0.5\% in volume. -from Authors",

author = "Durben, \{D. J.\} and George Wolf",

year = "1992",

language = "English (US)",

volume = "77",

pages = "890--893",

journal = "American Mineralogist",

issn = "0003-004X",

publisher = "Walter de Gruyter GmbH",

number = "7-8",

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TY - JOUR

T1 - High-temperature behavior of metastable MgSiO3 perovskite

T2 - a Raman spectroscopic study

AU - Durben, D. J.

AU - Wolf, George

PY - 1992

Y1 - 1992

N2 - The thermal behavior of metastable magnesium silicate (MgSiO3) perovskite has been investigated with Raman spectroscopy at ambient pressure. No evidence for previously predicted high-temperature crystal phase transformations or soft mode behavior is observed. Thermally induced vitrification of the perovskite to an amorphous phase with Si in tetrahedral coordination begins near 400 K and is complete by 750 K. Irreversible frequency shifts of the perovskite Raman bands accompany the vitrification. Residual Raman shifts of samples thermally cycled into the vitrification region indicate a contraction of the perovskite lattice of up to 0.5% in volume. -from Authors

AB - The thermal behavior of metastable magnesium silicate (MgSiO3) perovskite has been investigated with Raman spectroscopy at ambient pressure. No evidence for previously predicted high-temperature crystal phase transformations or soft mode behavior is observed. Thermally induced vitrification of the perovskite to an amorphous phase with Si in tetrahedral coordination begins near 400 K and is complete by 750 K. Irreversible frequency shifts of the perovskite Raman bands accompany the vitrification. Residual Raman shifts of samples thermally cycled into the vitrification region indicate a contraction of the perovskite lattice of up to 0.5% in volume. -from Authors

UR - https://www.scopus.com/pages/publications/0027035480

UR - https://www.scopus.com/pages/publications/0027035480#tab=citedBy

M3 - Article

SN - 0003-004X

VL - 77

SP - 890

EP - 893

JO - American Mineralogist

JF - American Mineralogist

IS - 7-8

ER -

High-temperature behavior of metastable MgSiO₃ perovskite: a Raman spectroscopic study

Abstract

ASJC Scopus subject areas

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