Pressure-induced phase transitions of Zn2SiO4 III and IV studied using in-situ Raman spectroscopy

Masami Kanzaki

doi:10.2465/jmps.180409

Pressure-induced phase transitions of Zn₂SiO₄ III and IV studied using in-situ Raman spectroscopy

Masami Kanzaki

Institute for Planetary Materials

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

Abstract

Recent structural study of the high-pressure Zn₂SiO₄ phases III and IV has suggested that they are retrograde phases formed during decompression. To clarify the stabilities of these phases under pressure, in-situ high- pressure Raman spectroscopic measurements were taken at room temperature. Phase III, having a 'tetrahedral olivine' structure, transformed to a new phase at 5.5 GPa during compression and returned to phase III at 1.7 GPa during decompression. Phase IV also exhibited a phase transition at 2.5 GPa with very small hysteresis. Both transitions are first-order. These observations confirmed that phases III and IV are retrograde phases.

Original language	English
Pages (from-to)	263-267
Number of pages	5
Journal	Journal of Mineralogical and Petrological Sciences
Volume	113
Issue number	5
DOIs	https://doi.org/10.2465/jmps.180409
Publication status	Published - 2018

Keywords

High-pressure phase
Phase transition
Raman spectroscopy
Unquenchable phase
ZnSiO

ASJC Scopus subject areas

Geophysics
Geology

Access to Document

10.2465/jmps.180409

Cite this

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title = "Pressure-induced phase transitions of Zn2SiO4 III and IV studied using in-situ Raman spectroscopy",

abstract = "Recent structural study of the high-pressure Zn2SiO4 phases III and IV has suggested that they are retrograde phases formed during decompression. To clarify the stabilities of these phases under pressure, in-situ high- pressure Raman spectroscopic measurements were taken at room temperature. Phase III, having a 'tetrahedral olivine' structure, transformed to a new phase at 5.5 GPa during compression and returned to phase III at 1.7 GPa during decompression. Phase IV also exhibited a phase transition at 2.5 GPa with very small hysteresis. Both transitions are first-order. These observations confirmed that phases III and IV are retrograde phases.",

keywords = "High-pressure phase, Phase transition, Raman spectroscopy, Unquenchable phase, ZnSiO",

author = "Masami Kanzaki",

note = "Publisher Copyright: {\textcopyright} 2018, Tohoku University.",

year = "2018",

doi = "10.2465/jmps.180409",

language = "English",

volume = "113",

pages = "263--267",

journal = "Journal of Mineralogical and Petrological Sciences",

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T1 - Pressure-induced phase transitions of Zn2SiO4 III and IV studied using in-situ Raman spectroscopy

AU - Kanzaki, Masami

PY - 2018

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N2 - Recent structural study of the high-pressure Zn2SiO4 phases III and IV has suggested that they are retrograde phases formed during decompression. To clarify the stabilities of these phases under pressure, in-situ high- pressure Raman spectroscopic measurements were taken at room temperature. Phase III, having a 'tetrahedral olivine' structure, transformed to a new phase at 5.5 GPa during compression and returned to phase III at 1.7 GPa during decompression. Phase IV also exhibited a phase transition at 2.5 GPa with very small hysteresis. Both transitions are first-order. These observations confirmed that phases III and IV are retrograde phases.

AB - Recent structural study of the high-pressure Zn2SiO4 phases III and IV has suggested that they are retrograde phases formed during decompression. To clarify the stabilities of these phases under pressure, in-situ high- pressure Raman spectroscopic measurements were taken at room temperature. Phase III, having a 'tetrahedral olivine' structure, transformed to a new phase at 5.5 GPa during compression and returned to phase III at 1.7 GPa during decompression. Phase IV also exhibited a phase transition at 2.5 GPa with very small hysteresis. Both transitions are first-order. These observations confirmed that phases III and IV are retrograde phases.

KW - High-pressure phase

KW - Phase transition

KW - Raman spectroscopy

KW - Unquenchable phase

KW - ZnSiO

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