Glasses were prepared which had a wide range of compositions, with fixed O/B or Na/B ratios. Raman spectroscopic and ionic conductivity measurements were used to clarify the role which was played by the iodide. In the case of a fixed O/B ratio, the addition of the iodide had a marked effect upon the network structure of the glass, and increased the conductivity. A comparison with previous Raman data showed that I ions entered interstitial positions and produced a rearrangement of the network by breaking B-O-B links. In the case of a fixed Na/B ratio, the substitution of the iodide did not appreciably affect the glass structure or the conductivity.

B.K.Choi, K.H.Shin: Physics and Chemistry of Glasses, 1996, 37[3], 87-91