Physics and Chemistry of Minerals

, Volume 41, Issue 6, pp 419–429 | Cite as

Compressibility of Ca3Al2Si3O12 perovskite up to 55 GPa

  • Steeve GréauxEmail author
  • Denis Andrault
  • Laurent Gautron
  • Nathalie Bolfan-Casanova
  • Mohamed Mezouar
Original Paper


Compressibility of perovskite-structured Ca3Al2Si3O12 grossular (GrPv) was investigated at high pressure and high temperature by means of angle-dispersive powder X-ray diffraction using a laser-heated diamond anvil cell. We observed the Pbnm orthorhombic distortion for the pure phase above 50 GPa, whereas below this pressure, Al-bearing CaSiO3 perovskite coexists with an excess of corundum. GrPv has a bulk modulus (K 0 = 229 ± 5 GPa; \(K_{0}^{{\prime }}\) fixed to 4) almost similar to that reported for pure CaSiO3 perovskite. Its unit-cell volume extrapolated to ambient conditions (V 0 = 187.1 ± 0.4 Å3) is found to be ~2.5 % larger than for the Al-free phase. We observe an increasing unit-cell anisotropy with increasing pressure, which could have implications for the shear properties of Ca-bearing perovskite in cold slabs subducted into the Earth’s mantle.


Grossular garnet CaSiO3 perovskite Aluminum High pressure In situ X-ray diffraction 



The authors thank N. Guignot for his helpful assistance in the experiments on ID30, at the synchrotron radiation facility, ESRF (Project HS2330). We are grateful for assistance of M. A. Bouhifd in the preparation of starting materials. We thank M. Nishi, X. Wang and two anonymous reviewers for their constructive comments on the manuscript. We are grateful to C. McCammon for handling the manuscript. This work was supported by the program ATIP CNRS INSU.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Steeve Gréaux
    • 1
    • 2
    Email author
  • Denis Andrault
    • 3
  • Laurent Gautron
    • 4
  • Nathalie Bolfan-Casanova
    • 3
  • Mohamed Mezouar
    • 5
  1. 1.Geodynamics Research CenterEhime UniversityMatsuyamaJapan
  2. 2.Earth-Life Science InstituteTokyo Institute of TechnologyTokyoJapan
  3. 3.Laboratoire Magmas et VolcansUniversité Blaise PascalClermont-FerrandFrance
  4. 4.Laboratoire des Géomateriaux et Géologie de l’IngénieurUniversité Paris-EstMarne la ValléeFrance
  5. 5.European Synchrotron Radiation FacilityGrenobleFrance

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