| Abstract: | Nine ternary chalcogenidehalides of copper could be synthesized under hydrothermal conditions from the resp. hydrogen halide solutions. They belong to the pseudobinary systems, formed between selenium and tellurium and the resp. CuI halide. In the selenium systems exist: CuISe3, rhombohedral; CuBrSe3, orthorhombic, and CuClSe2, monoclinic. Two homologous series of tellurium compounds exist: CuXTe, tetragonal, and CuXTe2, monoclinic (X ? Cl, Br, I). Thermodynamic data could be obtained for the selenium compounds using the Knudsen effusion method. The samples exhibit a temperature independant diamagnetism. All compounds can also be synthesized by reaction of stoichiometric amounts of CuI halide and selenium (300°C) or tellurium (350°C). The corresponding thiohalides could not be observed. |
