Far infrared transmission and structure of Pb---Ge---S semiconducting glasses

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Title:	Far infrared transmission and structure of Pb---Ge---S semiconducting glasses
Authors:	Bhatia, K.L. Katyal, S.C. Venugopalan, S.
Issue Date:	1979
Publisher:	Elsevier
Citation:	Journal of Non-Crystalline Solids, 1979, Vol.31, p333-337
Abstract:	Lead sulfide has been found to form stable glasses with GeS2 in the presence of GeS. Far-infrared transmission spectra of the glassy compositions x = 0.46, 0.23 and 0.115 in the pseudoternary (PbS)x (GeS2)0.70−x (GeS)0.30 and of the stoichiometric crystalline composition Pb2GeS4 have been observed for the first time. The results indicate a two optical mode behaviour of the compounds. The presence of the heavy lead atom in the Ge---S network seems to appreciably affect the bond bending modes of the GeS4 molecular unit without significantly disturbing its bond stretching vibrations. The presence of S3Ge---GeS3 molecular units in the amorphous compositions and their absence in Pb2GeS4 are indicated.
Description:	Restricted Access.
URI:	http://hdl.handle.net/2289/3412
ISSN:	0022-3093
Alternative Location:	http://dx.doi.org/doi:10.1016/0022-3093(79)90145-5
Copyright:	1979 Elsevier B.V.
Appears in Collections:	Research Papers (SCM)

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