High-temperature heat capacity and thermodynamic properties of Pb 4 V 2 O 9  and Pb 8 V 2 O 13

L. T. Denisova; A. D. Izotov; L. A. Irtyugo; Yu. F. Kargin; V. M. Denisov; V. V. Beletskii

doi:10.1134/S0012501616040023

High-temperature heat capacity and thermodynamic properties of Pb₄V₂O₉ and Pb₈V₂O₁₃

Авторлар: Denisova L.T.¹, Izotov A.D.², Irtyugo L.A.¹, Kargin Y.F.³, Denisov V.M.¹, Beletskii V.V.¹
Мекемелер:
1. Institute of Nonferrous Metals and Materials Science
2. Kurnakov Institute of General and Inorganic Chemistry
3. Baikov Institute of Metallurgy and Materials Science
Шығарылым: Том 467, № 2 (2016)
Беттер: 49-52
Бөлім: Physical Chemistry
URL: https://journals.rcsi.science/0012-5016/article/view/153529
DOI: https://doi.org/10.1134/S0012501616040023
ID: 153529

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Аннотация

The molar heat capacity of Pb₄V₂O₉ and Pb₈V₂O₁₃ in the temperature range 350–1000 K was measured by differential scanning calorimetry. It was determined that the plot C_p = f(T) for Pb₈V₂O₁₃ has an extremum within the range 416–516 K, which is due to a phase transition. A correlation was found between the heat capacity and composition of oxides in the PbO–V₂O₅ system. The data obtained allowed one to predict the specific heat capacity value for Pb(VO₃)₂.