Molecular structure of As x Se100 − x glasses studied by x-ray spectroscopy

Evidence of network demixing in GeS2–Ga2S3 chalcogenide glasses: A phase transformation study

“…Glasses with stoichiometric compositions of (100 À x)GeS 2 -xGa 2 S 3 were prepared by the melt-quenching technique, where x ¼0, 5,10,14,15,16,17,19,20,25, and 30 mol% (delegated by Gx), respectively. Details of the glass preparation can be found elsewhere [23].…”

“…With the knowledge of random network model [1] and medium-range structural order (MRO) in covalent glasses [2], intensive investigations have been done on specific structural models in some simple binary glasses of Ge-X, Si-X, and As-X (X¼S or Se) systems by experimental structural probes and computer simulation [2][3][4][5][6][7][8][9][10]. Since then, much effort also has been devoted to address the nature of intermediate-range order in some ternary or quasi-binary glasses, however, structural studies of these systems, e.g.…”

Application of the Method of X-Ray Fluorescence Analysis to Determine the Composition of Glassy and Crystalline Alloys of the Systems As_xS_1-xand As_xSe_1-x

“…Δх= Sqrt((у/(1+α)) 2 ((Δу/у) 2 +(Δα/(1+α)) 2 )+(α 2 у 4 /(1+α) 6 )((Δα/α) 2 +4(Δу/у) 2 +9(Δα/(1+α)) 2 )…”

“…The dependences of the fine structure of the spectra on the setup parameters (anode voltage and cathode current) were studied so that the ratio of the lines of arsenic atoms and chalcogens in the X-ray spectra corresponded to the ratio of arsenic atoms and chalcogens in glasses. Since the ratio of the intensities of the Kα-lines of arsenic and selenium (arsenic and sulfur) for the studied samples depends on many factors (fluorescence yields, absorption cross-sections of both primary and fluorescence radiation by all atoms), it was impossible to conduct a quantitative analysis of the direct use of theoretical ratios for intensities lines in X-ray fluorescence spectra [6][7][8][9][10][11].…”