High-pressure behavior of otavite (CdCO3)

R. Minch, D. H. Seoung, L. Ehm, B. Winkler, K. Knorr, L. Peters, L. A. Borkowski, J. B. Parise, Y. Lee, L. Dubrovinsky, W. Depmeier

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19 Citations (Scopus)

Abstract

The high-pressure, room temperature behavior of otavite (CdCO3) was investigated by angle-dispersive synchrotron radiation powder diffraction up to 40 GPa, Raman spectroscopy up to 23 GPa and quantum mechanical calculations based on density functional theory. The calcite-type structure of CdCO 3 is stable up to at least ∼19 GPa as shown by Raman spectroscopy. The compression mechanism was obtained from structure refinements against the diffraction data. The quantum mechanical calculations propose a calcite-aragonite phase transition to occur at about 30 GPa. The existence of a pressure-induced phase transition is supported by the Raman and diffraction experiments. Evidence for the transformation is given by broadening of X-ray reflections and external Raman bands starting from about 19 GPa in both experiments.

Original languageEnglish
Pages (from-to)251-257
Number of pages7
JournalJournal of Alloys and Compounds
Volume508
Issue number2
DOIs
Publication statusPublished - 2010 Oct 22

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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    Minch, R., Seoung, D. H., Ehm, L., Winkler, B., Knorr, K., Peters, L., Borkowski, L. A., Parise, J. B., Lee, Y., Dubrovinsky, L., & Depmeier, W. (2010). High-pressure behavior of otavite (CdCO3). Journal of Alloys and Compounds, 508(2), 251-257. https://doi.org/10.1016/j.jallcom.2010.08.090