High-temperature heat capacity and thermodynamic properties of pyrovanadate Pb2V2O7 and orthovanadate Pb3(VO_{lass="a-plus-plu}

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• 作者：L. T. Denisova ; A. D. Izotov ; L. A. Irtyugo ; Yu. F. Kargin…
• 刊名：Doklady Physical Chemistry
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：466
• 期：1
• 页码：4-7
• 全文大小：221 KB
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• 作者单位：L. T. Denisova (1)
  A. D. Izotov (2)
  L. A. Irtyugo (1)
  Yu. F. Kargin (3)
  V. M. Denisov (1)
  V. V. Beletskii (1)
  
  1. Institute of Non-Ferrous Metals and Materials Science, Siberian Federal University, pr. Krasnoyarskii Rabochii 95, Krasnoyarsk, 660025, Russia
  2. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991, Russia
  3. Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Leninskii pr. 49, Moscow, 119991, Russia
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Physical Chemistry
  Russian Library of Science
  
• 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
• ISSN：1608-3121

文摘

The heat capacities of Pb₂V₂O₇ and Pb₃(VO₄)₂ as a function of temperature in the range 350–965 K have been studied by the differential scanning calorimetry method. The C _P = f(T) curve for Pb₂V₂O₇ is described by the equation C _p = (230.76 ± 0.51) + (73.60 ± 0.50)×10-3 T − (18.38 ± 0.54)×105 T -2 in the entire temperature range. For Pb₃(VO₄)₂, there is a well-pronounced extreme point in the C _P = f(T) curve at T = 371.5 K, which is caused by the existence of a structural phase transition. The thermodynamic properties of the oxide compounds have been calculated.