Physics and Chemistry of Minerals

, Volume 43, Issue 6, pp 447–458 | Cite as

Thermoelastic properties of chromium oxide Cr2O3 (eskolaite) at high pressures and temperatures

  • Anna M. Dymshits
  • Peter I. Dorogokupets
  • Igor S. Sharygin
  • Konstantin D. Litasov
  • Anton Shatskiy
  • Sergey V. Rashchenko
  • Eiji Ohtani
  • Akio Suzuki
  • Yuji Higo
Original Paper


A new synchrotron X-ray diffraction study of chromium oxide Cr2O3 (eskolaite) with the corundum-type structure has been carried out in a Kawai-type multi-anvil apparatus to pressure of 15 GPa and temperatures of 1873 K. Fitting the Birch–Murnaghan equation of state (EoS) with the present data up to 15 GPa yielded: bulk modulus (K 0,T0), 206 ± 4 GPa; its pressure derivative K0,T , 4.4 ± 0.8; (∂K 0,T /T) = ‒0.037 ± 0.006 GPa K‒1; a = 2.98 ± 0.14 × 10−5 K−1 and b = 0.47 ± 0.28 × 10‒8 K‒2, where α 0,T  = a + bT is the volumetric thermal expansion coefficient. The thermal expansion of Cr2O3 was additionally measured at the high-temperature powder diffraction experiment at ambient pressure and α 0,T0 was determined to be 2.95 × 10−5 K−1. The results indicate that coefficient of the thermal expansion calculated from the EoS appeared to be high-precision because it is consistent with the data obtained at 1 atm. However, our results contradict α 0 value suggested by Rigby et al. (Brit Ceram Trans J 45:137–148, 1946) widely used in many physical and geological databases. Fitting the Mie–Grüneisen–Debye EoS with the present ambient and high-pressure data yielded the following parameters: K 0,T0 = 205 ± 3 GPa, K0,T  = 4.0, Grüneisen parameter (γ 0) = 1.42 ± 0.80, q = 1.82 ± 0.56. The thermoelastic parameters indicate that Cr2O3 undergoes near isotropic compression at room and high temperatures up to 15 GPa. Cr2O3 is shown to be stable in this pressure range and adopts the corundum-type structure. Using obtained thermoelastic parameters, we calculated the reaction boundary of knorringite formation from enstatite and eskolaite. The Clapeyron slope (with \({\text{d}}P/{\text{d}}T = - 0.014\) GPa/K) was found to be consistent with experimental data.


Chromium oxide Eskolaite Thermal equation of state Experiment High pressure Thermal expansion Knorringite formation 



This work was supported by the Ministry of Education and Science of Russian Federation (Project No 14.B25.31.0032), Grant of President of Russian Federation for Young PhD (No MK-265.2014.5) and Russian Foundation for Basic Research (Grants Nos 14-05-00957 and 15-35-20556). Experiments were conducted under SPring-8 general research proposals Nos 2011B1091, 2012A1416, 2012B1289 and Photon Factory proposals Nos 2012G031 and 2010G182.

Supplementary material

269_2016_808_MOESM1_ESM.docx (23 kb)
Supplementary material 1 (DOCX 22 kb)


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Copyright information

© Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Anna M. Dymshits
    • 1
  • Peter I. Dorogokupets
    • 2
  • Igor S. Sharygin
    • 1
  • Konstantin D. Litasov
    • 1
    • 3
  • Anton Shatskiy
    • 1
    • 3
  • Sergey V. Rashchenko
    • 1
    • 3
  • Eiji Ohtani
    • 4
  • Akio Suzuki
    • 4
  • Yuji Higo
    • 5
  1. 1.V.S. Sobolev Institute of Geology and MineralogySiberian Branch of Russian Academy of ScienceNovosibirskRussia
  2. 2.Institute of the Earth’s CrustSiberian Branch of the Russian Academy of SciencesIrkutskRussia
  3. 3.Novosibirsk State UniversityNovosibirskRussia
  4. 4.Department of Earth and Planetary Materials Science, Graduate School of ScienceTohoku UniversitySendaiJapan
  5. 5.SPring-8, Japan Synchrotron Radiation Research InstituteKouto, HyogoJapan

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