Raman spectra of certain tellurite glasses and crystals

Bobovich, Ya. S.; Yakhkind, A. K.

doi:10.1007/bf00747731

Cited by 16 publications

(2 citation statements)

References 2 publications

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“…The first Raman spectrum of GeO 2 glass was described by Bobovich and Tolub [72] and Obukhov-Denisov et al [73]. A Raman spectrum for GeO 2 glass is shown in figure 8 2), (c) Unpolarized Raman spectrum of GeO 2 glass (solid line) compared with calculated HH spectrum of GeO 2 glass (dashed-dot line) from Giacomazzi et al [58].…”

Section: Geo 2 Glass and Liquidmentioning

confidence: 95%

“…Ge NMR would normally be the technique of choice to investigate the coordination environment of Ge in glasses. Germanium has five naturally occurring isotopes ( 70 Ge, 72 Ge, 73 Ge, 74 Ge and 76 Ge) but only 73 Ge is suitable for NMR studies. However, while 73 Ge NMR has been successfully performed on solid crystalline compounds [89][90][91] it has not been useful for elucidating the structure of glasses [92,93].…”

Section: Nmr Spectroscopymentioning

confidence: 99%

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The structure of amorphous, crystalline and liquid GeO₂

Micoulaut

Cormier

Henderson

2006

J. Phys.: Condens. Matter

228

252

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Abstract. Germanium dioxide (GeO 2 ) is a chemical analogue of SiO 2 . Furthermore, it is also to some extent a structural analogue, as the low and high-pressure short-range order (tetrahedral and octahedral) is the same. However, a number of differences exist. For example, the GeO 2 phase diagram exhibits a smaller number of polymorphs, and all three GeO 2 phases (crystalline, glass, liquid) have an increased sensitivity to pressure, undergoing pressure induced changes at much lower pressures than their equivalent SiO 2 analogues. In addition, differences exist in GeO 2 glass in the medium range order, resulting in the glass transition temperature of germania being much lower than for silica. This review highlights the structure of amorphous GeO 2 by different experimental (e.g., Raman and NMR spectroscopy, neutron and x-ray diffraction) and theoretical methods (e.g., classical molecular dynamics, ab initio calculations). It also addresses the structure of liquid and crystalline GeO 2 that have received much less attention. Furthermore, we compare and contrast the structural differences between GeO 2 and SiO 2 , as well as, along the GeO 2 − SiO 2 join. It is probably a very timely review as interest in this compound, that can be investigated in the liquid state at relatively low temperatures and pressures, continues to increase.

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Section: Geo 2 Glass and Liquidmentioning

confidence: 95%

Section: Nmr Spectroscopymentioning

confidence: 99%

The structure of amorphous, crystalline and liquid GeO₂

Micoulaut

Cormier

Henderson

2006

J. Phys.: Condens. Matter

228

252

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The electronic and optical properties of germanium tellurite glasses containing various transition metal oxides

Khan¹,

Hassan²,

Hogarth³

1988

Phys. Stat. Sol. (a)

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A Study of the Effects of CuO on the Structure and Optical Absorption of Tellurite Glasses

Khan

1990

phys. stat. sol. (a)

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The optical absorption coefficient, density and infrared absorption spectra of a series of binary coppertellurite glasses are measured as a function of copper content. It is found that the fundamental absorption edge is a function of glass composition and the optical absorption in the glasses can be analysed in terms of non‐direct transition across an optical energy gap. The comparison of irspectra of tellurite glasses containing up to 15 mol% of CuO, indicates that the modifier does not change the co‐ordination of tellurium.

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Raman spectra of certain tellurite glasses and crystals

Cited by 16 publications

References 2 publications

The structure of amorphous, crystalline and liquid GeO₂

The structure of amorphous, crystalline and liquid GeO₂

The electronic and optical properties of germanium tellurite glasses containing various transition metal oxides

A Study of the Effects of CuO on the Structure and Optical Absorption of Tellurite Glasses

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Raman spectra of certain tellurite glasses and crystals

Cited by 16 publications

References 2 publications

The structure of amorphous, crystalline and liquid GeO2

The structure of amorphous, crystalline and liquid GeO2

The electronic and optical properties of germanium tellurite glasses containing various transition metal oxides

A Study of the Effects of CuO on the Structure and Optical Absorption of Tellurite Glasses

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Product

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About

The structure of amorphous, crystalline and liquid GeO₂

The structure of amorphous, crystalline and liquid GeO₂