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The application of high pressures and temperatures will usually produce very drastic changes in the properties of a material. These changes can be crystallographic transformations or severe distortions and are evidenced by changes in electrical resistivity. In the case of electronic materials, which are characterized by discrete energy bands, the changes are of such magnitude that entirely new species of the material are produced. This paper discusses some of the high-pressure phases produced in indium antimonide and some of the intermetallic tellurium compounds, including tin telluride. Examples of new materials synthesized under pressure are illustrated by a discussion of a samarium selenide compound. A general discussion of the stability of these high-pressure phases is presented with specific examples in the mercury-sulfur-selenium and mercury-cadmium-telluride systems.
Warekois, E. P.
Group Leader, Lincoln Laboratory, Massachusetts Institute of Technology, Lexington, Mass.