III. Supraconductivité et stabilité du réseau cristalin

Although the local coordination of the constituent atoms in amorphous and crystalline As₂Te₃ is significantly different, the densities of valence states of the two structural forms as determined by high resolution monochromatized X-ray photoemission are surprisingly similar. It is shown that the nonbonding p-like features in the density of valence states of both forms depend primarily upon the chemical composition and chemical order, and not upon the coordination numbers, bond angles and structural order.