Sb2O4 at high pressures and high temperatures

Denis Orosel, Paul Balog, H Liu, J Qian, Martin Jansen

Research output: Contribution to journalArticle

Abstract

Investigations on Sb2O4 at high pressure and temperature have been performed up to 600 °C and up to 27.3 GPa. The so-called “high temperature” phase (-Sb2O4) was obtained following pressure increase at ambient temperature and at relatively low temperatures. Thus, in contrast to previous perceptions, -Sb2O4 is the modification more stable at high pressures, i.e., at low temperatures. The fact that the metastable α-form is typically obtained through the conventional way of preparation has to be attributed to kinetic effects. The pressure-induced phase transitions have been monitored by in-situ X-ray diffraction in a diamond anvil cell, and confirmed ex-situ, by X-ray diffraction at ambient conditions, following temperature decrease and decompression in large volume devices. Bulk modulus values have been derived from the pressure-induced volume changes at room temperature, and are 143 GPa for α-Sb2O4 and 105 GPa for the -Sb2O4.
Original languageEnglish
Pages (from-to)2602-2607
JournalJournal of Solid State Chemistry
Volume178
Issue number9
DOIs
Publication statusPublished - 2005

Treatment code (Nähere Zuordnung)

  • Basic - Fundamental (Grundlagenforschung)
  • Experimental

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