Abstract
The structure of the ionic glasses , where x = 0.35, 0.40, 0.45, has been measured at 20 K by using neutron diffraction. The results show that units exist as the predominant structural motifs at all compositions, give a Bi-Cl nearest-neighbour distance of 2.53(2) Å, and an angle Cl-Bi-Cl of . The nearest-neighbour K-Cl correlations occur at about 3.1 Å. The first sharp diffraction peak observed in the total structure factors is attributed to Bi-Bi correlations and the shift in its position to smaller scattering vector values with increased x is attributed to an enlarged separation of the units with enhanced KCl content.
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