Partial Pressures over the Pseudobinary Solid Solution Hg1 − x Cd x Te ( s ) for x = 0.70 and 0.95 and over Four Te‐rich Ternary Melts

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Abstract
The partial pressures of Hg, Cd, and have been determined between 420° and 840°C from optical absorption measurements for four Te‐rich compositions and for the Te‐saturated solid solution with . In addition to further thermodynamically characterizing the melt, the former measurements yield ternary liquidus points. They also yield tie lines when combined with the present and previous measurements on Te‐saturated solid solutions. These results, from an essentially steady‐state technique, agree well with those of Harman. The measurements on the solid solutions yield values for the mixing quantities which are more accurate than our previous values. These are described well in terms of a quasi‐regular solution of and components with an enthalpy of mixing of 1074 cal/g‐atom and an excess entropy of mixing of 0.893 cal/K‐g‐atom at 50 mole percent .

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