STRUCTURAL INVESTIGATION OF LIQUID GE-CHALCOGEN MIXTURES

Neutron diffraction studies of liquid Ge-Se and Ge-Te mixtures have be en carried out by using the steady-state and pulsed neutron sources, T he structure factors for liquid Ge33Se67 suggest that Ge and Se atoms form covalent bonds in the liquid state and that a network structure i s formed. However, this structure is quickly broken with increasing te mperature or by changing the composition of mixtures. On the other han d, the bonds between Ge and Te atoms seem to be weaker than those betw een Ge and Se atoms and show metallic properties.