English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Spectroscopic evidence for pressure-induced phase transitions in diopside

Chopelas, A., & Serghiou, G. (2002). Spectroscopic evidence for pressure-induced phase transitions in diopside. Physics and Chemistry of Minerals, 29(6), 403-408.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-90E2-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-90E3-6
Genre: Journal Article
Alternative Title : Phys. Chem. Miner.

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Chopelas, A.1, Author              
Serghiou, G.1, Author              
Affiliations:
1High Pressure Group, Max Planck Institute for Chemistry, Max Planck Society, ou_1826289              

Content

show
hide
Free keywords: diopside; clinopyroxene; Raman spectroscopy; high pressure
 Abstract: Raman spectra of diopside were collected from atmospheric pressure to 71 GPa. The pressure dependences of 22 modes were determined. Changes occurred in the spectra at three different pressures. First, at approximately 10 GPa, the two Raman modes at 356 and 875 cm(-1) disappeared, while the mode at 324 cm(-1) split into two modes, diverging at this pressure with significantly different pressure shifts; second, at approximately 15 GPa, a small (1 to 2 cm(-1)) drop in several of the frequencies was observed accompanied by changes in the pressure dependency of some of the modes; and third, above 55 GPa, the modes characteristic of chains of tetrahedrally coordinated silicon disappeared, while those for octahedrally coordinated silicon appeared. The first change at 10 GPa appears to be a C2/c to C2/c transition involving a change in the Ca coordination. The third change above 55 GPa appears to be a change in the silicon coordination. At 15 GPa, it is suggested that a change in compressional mechanism takes place.

Details

show
hide
Language(s): eng - English
 Dates: 2002-07
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 15542
ISI: 000177396700003
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Physics and Chemistry of Minerals
  Alternative Title : Phys. Chem. Miner.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 29 (6) Sequence Number: - Start / End Page: 403 - 408 Identifier: ISSN: 0342-1791