Phase diagram of the selenium-thallium system

466 K) = 0.27 kJ moP are reported. The heat capacity of a-TlSe at 298.15 K calculated from the expression is C° uncertainty limits of the selected value. 

The enthalpy of formation of a-TlSe was determined to be Af//°(TISe, a, 298.15 K) = - (61.0 2.0) kJ-moP by Vasiliev, Nikolskaya, Bachinskaya, and Gerasimov [67VAS/NIK] from electrochemical measurements in the temperature range 313 to 413 K using the cell (-) Tl(cr) TlCl, KCI (in glycerol) a-TlSe, Se(trig) (-I-). 

Morgant, Feutelais, Schnitter, and Legendre [91MOR/FEU] measured the cell 

The datum is included in Appendix E since it was calculated with non-TDB auxiliary data. 

The Gibbs energy of formation is calculated from the accepted enthalpy of formation and entropy of a-TlSe, the selected entropy of selenium, and the entropy of thallium in [82WAG/EVA] to be  

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Figure V-16 Phase diagram of the selenium-thallium system.

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