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Abstract:
It has been found that mixed crystals of the general composition Te2.0Br1−x I x , where x ≤0.75 form glasses when cooled from the melt. We present the results of the thermal, structural, and photoemission experiments on Te2.0Br0.75I0.25, which is representative of the materials of the general composition above. The radial distribution function of the glassy form determined from x‐ray diffraction indicates that the short range order is similar to that of the crystalline phase. Differences in the density of valence states of elemental Te and Te2.0Br0.75I0.25 as determined with uv and x‐ray photoemission show that the electronic configuration characteristic of twofold coordinated Te is absent in the mixed crystals. The sharp core level spectra observed in the mixed crystal demonstrates that each type of element is in a similar Coulombic environment.
