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Origin of the blue colour in alkali-borate glasses containing sulphur

Abstract

The optical, absorption, emission and excitation spectra of blue binary alkali-borate glasses containing sulphur have been studied. The presence of dissolved water in glass was found to help the formation of blue sulphur chromophore, the chromophore being unstable in glasses containing less than 10 mol % R2O or more than 30 mol % R2O. The blue colour is suggested to be due to the S2 (hypersulphide) ion, and optical absorption and emission transitions due to this ion have been assigned.

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Paul, A., Ward, A. & Gomolka, S. Origin of the blue colour in alkali-borate glasses containing sulphur. J Mater Sci 9, 1133–1138 (1974). https://doi.org/10.1007/BF00552829

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Keywords

  • Colour
  • Polymer
  • Sulphur
  • Optical Absorption
  • Excitation Spectrum