Physics and Chemistry of Minerals

, Volume 44, Issue 7, pp 465–476 | Cite as

Combined high-pressure and high-temperature vibrational studies of dolomite: phase diagram and evidence of a new distorted modification

  • I. EfthimiopoulosEmail author
  • S. Jahn
  • A. Kuras
  • U. Schade
  • M. Koch-Müller
Original Paper


A combined high-pressure mid-infrared absorption and Raman spectroscopy study on a natural CaMg0.98Fe0.02(CO3)2 dolomite sample was performed both at ambient and high temperatures. A pressure–temperature phase diagram was constructed for all the reported dolomite ambient- and high-pressure polymorphs. In addition, a local distortion of the ambient-pressure dolomite structure was identified close to 11 GPa, just before the transition toward the first known high-pressure phase. All the Clausius–Clapeyron slopes are found to be positive with similar magnitudes. Complementary first-principles calculations suggest a metastable nature of the high-pressure dolomite polymorphs. Finally, theoretical spectroscopy is used to interpret and discuss the observed changes in the measured vibrational spectra.


Dolomite Phase diagram High-pressure transitions Vibrational spectroscopy First-principles 



We thank Prof. Wilhelm Heinrich for providing us with the natural dolomite samples, Hans-Peter Nabein for the XRD measurements at ambient conditions, and Dr. Eglof Ritter for his assistance with the SR-MIR experiments. We thank HZB for the allocation of synchrotron radiation beamtime. This study was partly supported by a Grant from Deutsche Forschungsgemeinschaft within the Research Unit FOR2125 under Grant KO1260/16 and JA1469/9.

Supplementary material

269_2017_874_MOESM1_ESM.docx (204 kb)
Supplementary material 1 (DOCX 204 KB)


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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • I. Efthimiopoulos
    • 1
    Email author
  • S. Jahn
    • 2
  • A. Kuras
    • 1
  • U. Schade
    • 3
  • M. Koch-Müller
    • 1
  1. 1.Deutsches GeoForschungsZentrum GFZ, Section 4.3PotsdamGermany
  2. 2.Institut für Geologie und MineralogieUniversität zu KölnCologneGermany
  3. 3.Helmholtz-Zentrum Berlin, EM-IMMBerlinGermany

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