Low-temperature heat capacity of monoclinic enstatite

Synthetic enstatite MgSiO 3 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...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2008-11, Vol.94 (2), p.493-497
Main Authors: Drebushchak, V. A., Kovalevskaya, Yulia A., Paukov, I. E., Surkov, N. V.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Chemistry
Chemistry and Materials Science
Inorganic Chemistry
Measurement Science and Instrumentation
Physical Chemistry
Polymer Sciences
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Summary:Synthetic enstatite MgSiO 3 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.
ISSN:1388-6150
1588-2926
1572-8943
DOI:10.1007/s10973-007-8443-7