Partial Pressures over HgTe ‐ CdTe Solid Solutions: II . Results for

The partial pressures of Hg, Cd, and Te 2 are obtained along the three‐phase curves for 10 , 20 , and 58 Mole Percent CdTe , HgTe ‐ CdTe solid solutions by measuring the optical absorbance of the coexisting vapor between 220 and 700 nm. The pressure ranges covered are 10 −2 –32 atm for Hg, 10 −8 –10 −5 atm for Cd, and 10 −5 –10 −2 atm for Te 2 , and Hg is always the predominant vapor species. The data allow the calculation of the chemical potentials of HgTe and CdTe and the Gibbs free enthalpy of formation for the solid solutions. In addition, the solidus temperatures are obtained directly from the optical absorbance measurements.