Thermodynamic and spectroscopic properties of KNbTeO₆

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• 作者：A.V. Knyazev^a ; ^{knyazevav@gmail.com} ; W. Paraguassu^b ; A.G. Blokhina^a ; M.I. Lelet^a ; S.S. Knyazeva^a ; G.B. Corrê ; a Junior^b
• 关键词：Pyrochlore ; KNbTeO6 ; Adiabatic vacuum calorimetry ; Heat capacity ; Thermodynamic functions ; Raman spectroscopy
• 刊名：The Journal of Chemical Thermodynamics
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：107
• 期：Complete
• 页码：26-36
• 全文大小：1737 K
• 卷排序：107

文摘

Temperature dependence of heat capacity of KNbTeO6 has been measured by precision adiabatic vacuum calorimetry. The thermodynamic functions of the KNbTeO6 have been determined for the range from T → 0 to 332 K. The character of heterodynamics of structure was detected. The phase transitions and thermal decomposition of KNbTeO6 were determined. Structural changes in phase transitions were studied by high-temperature Raman spectroscopy.