L. L. Makarov

X-ray emission spectroscopic study of the system GeSe in glassy and crystal states

Abstract X-ray emission spectroscopic experiments were performed on glass samples and on crystals in the GeSe system. Chemical shifts of Ge and Se K α 1 lines were measured for samples in composition range of 10–43 at.% Ge and for the crystalline GeSe 2 and GeSe. A small chemical disorder was found in the GeSe 2 glass. It was found that, in the composition range 10–33 at.% Ge, the glasses contain GeSe 4 2 structural units statistically distributed in the Se matrix. In glasses with 33–40 at.% Ge, the formation of Ge 2 Se 6 2 structural units was found. The effective charges of Ge atom in some phases were estimated.

State and distribution of atoms in GeXrinX (X = S, SE) from K-spectral emission data

The authors study the chemical shifts and x-ray emission lines of Ge, Se, and In in order to quantify the mutual effect of atoms present in the lattice of a glass, particularly their effective charges. They describe their experimental setup and set forth in a number of charts and tables their experimental results, which they analyze at length, with particular attention to the compatability between the chemical shifts and effective charges of atoms bound chemically with each other.

Use of the chemical shifts of the Kα1 X-ray line of47Ag to study the mechanism of sorption of gallium by silver sulfide

1. Using the chemical shifts of the Kα1 x-ray lines of Ag and the method of layerwise solution, the authors have investigated the reaction kinetics of the products of sorption of gallium by silver sulfide with a twofold excess of gallium in solution in relation to the stoichiometry. 2. In the initial stage of sorption of gallium by silver sulfide, two forms appear: the primary form, 2Ag2S · Ga2S3, and the final form, Ag4Ga2S5. 3. If the solid phase is in contact with the solution, the primary form is converted to the stable final form within 32 h.