Volatilisation of tellurium from gold telluride

Thermodynamic reassessment of the Au–Te system

“…It can be seen that the Neumann-Kopp rule is valid for the AuTe 2 compound. The calculated enthalpy of formation of AuTe 2 is −3.936 kJ per mole atoms, which is close to the result of Veale and Barrett [13] (−3.91 kJ per mole atoms). The cal- Fig.…”

“…1. The Au-Te phase diagram calculated from the present thermodynamic description in comparison with experimental measurements [10][11][12][13][14][15] and [18][19][20]. [3] in the 0.48-0.67 at.% Te.…”

“…The enthalpy of formation of AuTe 2 compound at 728 K is −2.5 kJ per mole of atoms and the enthalpy of fusion at 737 K is 18.6 kJ per mole of atoms, which were measured by direct reaction calorimetry [3]. The data for enthalpy of formation of AuTe 2 obtained from vapor pressure measurements by Andon et al [21] and Veale and Barrett [13] are −4.74 and −3.91 kJ per mole atoms, respectively, at 298 K. …”

“…Cabri [12] confirmed that the solubility is less than 0.46 at.% Te and no solubility of Au in AuTe 2 compound using the method of Lattice parameter measurements. Veale and Barrett [13] also estimated the solid solubility limits of this phase from the breaks of vapor pressure versus composition curves. The melting temperature of AuTe 2 compound was determined by conventional and differential thermal analysis [3,8,9].…”