Thermodynamic Aspects of the Temperature—Pressure Phase Diagram of InTe

摘要

The heat of transformation at one atmosphere from the metastable high‐pressure phase of InTe to the low‐pressure phase has been measured by metal solution calorimetry to be 0.44±0.01 kcal/g·atom and by differential scanning calorimetry to be 0.42±0.03 kcal/g·atom. These values are compared to the heat of transformation at 30 kbar obtained by applying the Clausius—Clapeyron equation to the temperature—pressure phase diagram of InTe. The volume change on fusion of the low‐pressure phase, InTe(I), at one atmosphere was measured to be 0.80 cc/mole. The initial slope of the liquidus in the phase diagram calculated using this value is in close agreement with the previously determined experimental slope. It is estimated that the triple point between the liquidus and the InTe(I)—InTe(II) phase boundary occurs at 718°C and 11 kbar.