Ag-109 MAS-NMR spectra of AgI-based glasses containing frozen alpha -AgI na
nocrystals were measured extensively for AgI-Ag2O-MxOy (MxOy = B2O3, GeO2)
systems. The spectrum of alpha -AgI frozen glass composite observed at room
temperature was separated into three components, which were ascribed to gl
ass matrix, alpha -AgI nanocrystals and crystalline beta -AgI. The temperat
ure dependencies of the spectra suggest the formation of more alpha -AgI na
nocrystals by heating. (C) 2000 Elsevier Science B.V. All rights reserved.