Abstract
Structural analysis of superionic glass Ag 0.5 (GeSe 3 ) 0.5 and in its molten state was performed by high-energy x-ray diffraction and neutron diffraction measurements at 110 and 300 K for the amorphous, 503 K for the supercooled-liquid state and 1223 K for molten state. Three-dimensional structural model at each temperature was obtained by means of reverse Monte Carlo (RMC) structural modelling on the basis of both diffraction data at 110 and 300 K and X-ray data at 503 and 1223 K. It was revealed that the Ag distribution in Ag 0.5 (GeSe 3 ) 0.5 glass has a tendency to form chain-like fragments even in the molten state. With decreasing temperature from the molten state, medium-range order as well as local order appears with extended large fluctuations in Ag distribution.
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