NEUTRON-DIFFRACTION STUDY OF LIQUID BI-SE ALLOYS

A neutron diffraction study on the liquid Bi-Se alloys has been carried out over the wide composition range from Bi2Se3 to pure Bi. an essential feature of the total structural functions is similar to those of pure liquid Bi in the Bi-rich range, suggesting that the additional Se atoms are almost substituted with the Bi atoms and they might form a certain short range order, because of the difference in the electronegativities of the constituents. The Bi-Bi configuration which is close to that of pure liquid Bi still remains in the Se-rich range. The partial structural functions have been estimated from the measured total structural data assuming their concentration independence.