Authors: Teredesai, P.V.; Anderson, D.T.; Hauser, N.; Lantzky, K.; Yarger, J.L.

Source: Physics and Chemistry of Glasses - European Journal of Glass Science and Technology Part B, Volume 46, Number 4, August 2005 , pp. 345-349(5)

Publisher: Society of Glass Technology

Abstract:

Room temperature infrared studies have been performed on GeO₂ glass under quasi-hydrostatic pressures of 9.5 GPa. The mid-infrared absorption spectrum of GeO₂ glass (g-GeO₂) shows two distinct vibrational modes, one at 560 cm⁻¹ (mid frequency peak) and another at 870 cm⁻¹ (high frequency peak). At pressures above 6 GPa, these two absorption peaks broaden and intensity in the region between them (∼700 cm⁻¹) increases dramatically. We interpret this change in the infrared spectrum at high pressure as the onset and progression of the amorphous to amorphous transformation from a low-density tetrahedral glass to a high density octahedral network glass.

Document Type: Research article

Publication date: 2005-08-01

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• In this Subject: Inorganic Chemistry
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