The heat capacity of Bi2Se3 cr as measured in various investigations

The melting point of Bi2Se3(cr) is 978 K and the measurements of the enthalpy of fusion are summarised in Table V-33. Premelting phenomena are pronounced and explain the scatter in the measured values. The selected value of the enthalpy of fusion is  

The Gibbs energy of formation of Bi2Sc3(cr) is calculated from the selected enthalpy of formation, the selected entropy of selenium, and the entropy of bismuth in [200ILEM/FUG] yielding  

Andreeva and Karapet yants [65AND/KAR], [66AND/KAR] performed calorimetric measurements from which the standard enthalpies of formation of Bi2(Se03)3(cr) and (Bi0)2Se03(cr) were found. Their data have been re-evaluated with new auxiliary data in Appendix A. The result is //° (Bi2(Se03)3, cr, 298.15 K) = 

However, according to Oppermann et al. [990PP/G0B] the decomposition of (BiO)2Se03(cr) to Bi203(cr) and Se02(g) comprises additional steps. Therefore no thermochemical data have been calculated by the review from these relationships. 

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Figure V-14 The heat capacity of Bi2Se3(cr) as measured in various investigations.

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