Crystal structure and thermodynamic properties of dipotassium diiron(III) hexatitanium oxide

In the present work, the temperature dependence of heat capacity of dipotassium diiron(III) hexatitanium oxide has been measured for the first time in the range from 10 to 300 K by means of precision adiabatic vacuum calorimetry. The experimental data were used to calculate standard thermodynamic fu...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2013-05, Vol.112 (2), p.991-996
Main Authors: Knyazev, A. V., Chernorukov, N. G., Letyanina, I. A., Zakharova, Yu. A., Ladenkov, I. V.
Format: Article
Language:English
Subjects:
Adiabatic flow
Analytical Chemistry
Calorimetry
Chemistry
Chemistry and Materials Science
Crystals
Entropy
Heat capacity
Inorganic Chemistry
Measurement Science and Instrumentation
Oxides
Physical Chemistry
Polymer Sciences
Specific heat
Structure
Temperature dependence
Thermal expansion
Thermodynamics
Toy industry
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Summary:In the present work, the temperature dependence of heat capacity of dipotassium diiron(III) hexatitanium oxide has been measured for the first time in the range from 10 to 300 K by means of precision adiabatic vacuum calorimetry. The experimental data were used to calculate standard thermodynamic functions, namely the heat capacity , enthalpy , entropy and Gibbs function for the range from T  → 0 to 300 K. The structure of K 2 Fe 2 Ti 6 O 16 is refined by the Rietveld method: space group I 4/ m , Z  = 1, a  = 10.1344(2) Å, c  = 2.97567(4) Å, V = 305.618(7) Å 3 . The high-temperature X-ray diffraction was used for the determination of coefficients of thermal expansion.
ISSN:1388-6150
1588-2926
1572-8943
DOI:10.1007/s10973-012-2606-x