title: Raman spectroscopic analysis of GeS2-Ga2S3-PbI2 chalcohalide glasses.
abstract: The structures of pseudo-binary GeS2-PbI2, Ga2S3(GaS)-PbI2 and pseudo-ternary GeS2-Ga2S3-PbI2 chalcohalide systems were investigated by Raman scattering spectroscopy. By evolving the vibrational bands as a function of PbI2 content, it was verified that the effect of addition of PbI2 to the glass network is threefold, namely: (i) the conversion of GeS4 tetrahedra to GeS3I and GeS2I2 structural units, (ii) the destruction of ethane-like S3Ga(Ge)-(Ge)GaS3 structural units and formation of GaS3I and GeS3I ones and (iii) formation of short S-S chains and [PbIn] structural units when the concentration of PbI2 is high.
authors.affiliation: Key Laboratory of Silicate Materials Science and Engineering, Wuhan University of Technology, Ministry of Education, 122 Luoshi Road, Hongshan District, Wuhan, Hubei 430070, PR China. guoht_001@163.com
authors.forename: Haitao
authors.initials: H
authors.lastname: Guo
authors.forename: Haizheng
authors.initials: H
authors.lastname: Tao
authors.forename: Yanbo
authors.initials: Y
authors.lastname: Zhai
authors.forename: Shun
authors.initials: S
authors.lastname: Mao
authors.forename: Xiujian
authors.initials: X
authors.lastname: Zhao
mesh_terms: D005708:Gallium / Q000737:chemistry*; D005857:Germanium / Q000737:chemistry*; D005898:Glass / Q000737:chemistry*; D007854:Lead / Q000737:chemistry*; D013059:Spectrum Analysis, Raman; D014961:X-Ray Diffraction
chemical_list: D005857:Germanium; D007854:Lead; D005708:Gallium