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Journal of Thermal Analysis and Calorimetry

, Volume 94, Issue 2, pp 493–497 | Cite as

Low-temperature heat capacity of monoclinic enstatite

  • V. A. Drebushchak
  • Yulia A. Kovalevskaya
  • I. E. Paukov
  • N. V. Surkov
Article

Abstract

Synthetic enstatite MgSiO3 was crystallized from a melt, quenched into water, and then annealed at 873 K. The product is the monoclinic polymorph with the unit cell parameters of a=0.9619(7), b=0.8832(3), c=0.5177(4) nm, β=108.27(5)°. Heat capacity was measured from 6 to 305 K using an adiabatic vacuum calorimeter. Thermodynamic functions for clinoenstatite differ by about 5% from those predicted after a thermodynamic model in the literature, but are very close to those measured for orthorhombic enstatite.

Keywords

enstatite heat capacity MgSiO3 polymorphs 

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Copyright information

© Springer Science+Business Media, LLC. 2008

Authors and Affiliations

  • V. A. Drebushchak
    • 1
    • 2
    • 3
  • Yulia A. Kovalevskaya
    • 2
  • I. E. Paukov
    • 2
  • N. V. Surkov
    • 1
  1. 1.Institute of Geology and Mineralogy SB RASNovosibirskRussia
  2. 2.Institute of Inorganic Chemistry SB RASNovosibirskRussia
  3. 3.‘Molecular Design and Ecologically Safe Technologies’ REC-008Novosibirsk State UniversityNovosibirskRussia

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