Accession Number : ADA130527

Title :   Vibrational Spectra of Single and Mixed Alkali Pentasilicate Glasses.

Descriptive Note : Technical rept.,

Corporate Author : BROWN UNIV PROVIDENCE RI DEPT OF CHEMISTRY

Personal Author(s) : Kamitsos, Efstratios I ; Risen,William M , Jr

PDF Url : ADA130527

Report Date : 20 May 1983

Pagination or Media Count : 40

Abstract : The far infrared and laser Raman spectra of single and mixed alkali pentasilicate glasses, M20.5Si02 (M = Na, K, Rb, Cs), and xCs20(1-x)Na20.5Si02 are reported in both the annealed and unannealed forms. Study of the cation-motion bands in the far infrared shows that the vibrationally significant cation-network interactions are unaffected by either introduction of a second cation or by annealing, and these results are discussed in terms of the glass formation and annealing. The spectra of the network show the existence of intrinsic network strain, changes in distributions of bond angles related to alkali mixing and annealing, and evidence for the nature of the distribution of cations in the glass. The results are discussed in relation to the composition dependence of other properties of these and related mixed alkali glasses. (Author)

Descriptors :   *Vibrational spectra, *Silica glass, *Ions, *Conduction bands, Infrared spectra, Far infrared radiation, Raman spectra, Cations, Ion ion interactions, Alkali metals, Mixing, Annealing, Chemical bonds, Angles, Distribution, Transformations, Strain(Mechanics), Diffusion coefficient, Electrical conductivity

Subject Categories : Ceramics, Refractories and Glass
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE