High-pressure behavior of As2 O3: Amorphous-amorphous and crystalline-amorphous transitions

E. Soignard, S. A. Amin, Q. Mei, C. J. Benmore, Jeffery Yarger

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

The room temperature compression of As2 O3 has been studied by in situ diamond anvil cell Raman and x-ray diffraction up to a pressure of 35 GPa. Upon compression, we discovered a crystal-to-amorphous transition in arsenolite, while claudetite, which is another crystalline polymorph of As2 O3, remains crystalline up to at least 40 GPa. We have also observed an amorphous-amorphous transition in As2 O3 glass at 25 GPa. This transition is characterized by a dramatic change in the Raman spectrum, which is reversible upon decompression. In situ diamond anvil cell x-ray diffraction of As2 O3 glass reveals that the amorphous-amorphous transition is associated with an increase in the arsenic coordination. The amorphous-amorphous transition is reversible with little hysteresis.

Original languageEnglish (US)
Article number144113
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number14
DOIs
StatePublished - Apr 24 2008

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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