Electron-ion correlation in liquid Te II

The structure factors of liquid Te have been newly obtained at 470degC and 570degC by X-ray and neutron diffraction measurements. A remarkable and clear difference has been found between X-ray and neutron diffraction results. The ion-electron correlation function and valence electron charge distribution has been evaluated from this difference at the two different temperatures. It has two maximum values around 0.82A and 1.69A at 470degC just above the melting temperature, which corresponds to the distribution of the lone pair electrons and covalent bonded electrons around a central tellurium ion, while it has a maximum value around 1.1A at 570degC. (author)