Pressure-induced amorphization of wollastonite (CaSiO3) at room temperature

George C. Serghiou, William S. Hammack

Research output: Contribution to journalArticlepeer-review

Abstract

Energy dispersive x-ray diffraction and Raman measurements show that the mineral wollastonite (CaSiO3) becomes amorphous at a pressure of 25.6 GPa at 300 K. A consideration of the high pressure/high temperature behavior of CaSiO3 shows that the amorphization occurs because the phase transition wollastonite→perovskite CaSiO3 is kinetically impeded. We suggest that the amorphous phase may be viewed as a defective long-period modulated wollastonite phase.

Original languageEnglish (US)
Pages (from-to)9830-9834
Number of pages5
JournalThe Journal of Chemical Physics
Volume98
Issue number12
DOIs
StatePublished - Jan 1 1993
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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