Optical and electronic properties of Fe doped bulk a-As2S3

Several glasses in the (As₂S₃)_100?xFe_x system have been prepared from the melt under a variety of preparation conditions. The AC conductivity and optical properties of the homogeneous samples have been determined and compared with previous published results. The role of the impurity atoms is discussed with reference to spectroscopic experiments aimed at determining the local coordination of the Fe atoms.