Purification methods of Cd, Te and CdTe and periodicity of segregation coefficients of admixtures

The purification methods and their advantages and disadvantages for refining of Cd, Te and CdTe are summarized. Equilibrium segregation coefficients of admixtures in Cd, Te and CdTe were calculated from phase diagrams and compared with literature values. Their periodical dependence on the atomic number of admixtures is discussed. Theoretical and technological aspects of the production of high-purity materials are described via rectification, zone melting, and normal freezing with removal of non-purified material.