CALCULATION OF MINIMUM PRESSURE, P-T DIAGRAMS, AND SOLIDUS OF ZNTE

The partial pressures of the components, pzn and pTe2, for the Zn-Te system were evaluated along the liquidus curve on the basis of previously derived activities for a regular associated solution. Results are in good agreement with available experimental data. The minimum pressure of ZnTe was calculated from ΔH°Vap (298°K) and the free energy function, (G°T − H°298°k)/ T, of ZnTe and the component gases. The thermodynamic data for ZnTe needed for these calculations have also been critically reassessed or evaluated. By a combination of the measurements of Thomas and Sadowski with the values of pzn along the liquidus, a retrograde solidus for ZnTe was calculated. The calculated maximum solid solubility of Te in ZnTe is approximately 4.6 x 10−3 a/o (atom per cent) at 1200°C. © 1969, The Electrochemical Society, Inc. All rights reserved.