Raman spectroscopy of glasses and melts of the Na2O-GeO2 system

Abstract

Glasses and melts of the system X mol % Na2O · GeO2 (X = 0, 10, 20, 30) are investigated using high-temperature Raman spectroscopy. Addition of an oxide modifier is shown to bring about an increase in the coordination number of central germanium atoms along with the depolarization of the three-dimensional GeO2 network. The glass-melt transition in germanate systems with a low oxide-modifier content is accompanied by the transition of six-coordinated germanium atoms into four-coordinated (with oxygen) ones and a simultaneous formation of nonbridge oxygen atoms.

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Correspondence to T. N. Ivanova.

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Original Russian Text © T.N. Ivanova, V.N. Bykov, 2010, published in Rasplavy, 2010, No. 1, pp. 64–67.

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Ivanova, T.N., Bykov, V.N. Raman spectroscopy of glasses and melts of the Na2O-GeO2 system. Russ. Metall. 2010, 678–680 (2010). https://doi.org/10.1134/S0036029510080033

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Keywords

  • Raman Spectrum
  • RUSSIAN Metallurgy
  • Germanium Atom
  • Germanate System
  • Germanate Glass