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Low-temperature heat capacity of monoclinic enstatite

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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.

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Authors and Affiliations

  1. Institute of Geology and Mineralogy SB RAS, Pr. Ak. Koptyuga, 3, Novosibirsk, 630090, Russia

    V. A. Drebushchak & N. V. Surkov

  2. Institute of Inorganic Chemistry SB RAS, Pr. Ak. Lavrentieva, 3, Novosibirsk, 630090, Russia

    V. A. Drebushchak, Yulia A. Kovalevskaya & I. E. Paukov

  3. ‘Molecular Design and Ecologically Safe Technologies’ REC-008, Novosibirsk State University, Ul. Pirogova 2, Novosibirsk, 630090, Russia

    V. A. Drebushchak

Authors
  1. V. A. Drebushchak
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  2. Yulia A. Kovalevskaya
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  3. I. E. Paukov
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  4. N. V. Surkov
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Correspondence to V. A. Drebushchak.

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Drebushchak, V.A., Kovalevskaya, Y.A., Paukov, I.E. et al. Low-temperature heat capacity of monoclinic enstatite. J Therm Anal Calorim 94, 493–497 (2008). https://doi.org/10.1007/s10973-007-8443-7

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  • DOI: https://doi.org/10.1007/s10973-007-8443-7

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