The structure of permanently densified GeSe2 glasses

Q. Mei, P. V. Teredesai, C. J. Benmore, S. Sampath, Jeffery Yarger, E. Bychkov, J. Neuefeind, K. Lienenweber

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

GeSe2 is an archetypal tetrahedral glass that differs from both vitreous silica and germania in that it forms a network of both edge and corner sharing tetrahedra with a substantial number of homopolar bonds at normal pressure. A combination of high energy diffraction measurements and Raman spectroscopy have been performed on glassy GeSe2 samples with densities of 3 and 4% greater than the normal glass. The samples were pressurised in a multi-anvil cell and recovered to ambient pressure for the experiments. The higher density samples show a dramatic decrease in the first sharp diffraction peak height and shift to higher Q-values on densification. This is related to a breakdown of intermediate range order arising from the Ge-Ge interactions. X-ray difference functions suggest there is an increase in Ge-Ge corner sharing tetrahedra for the 4% denser glass compared to the normal glass. The Raman data also show a decrease in ratio of edge sharing:corner sharing tetrahedra indicating a change in the distribution of large ring structures that form the glassy network.

Original languageEnglish (US)
Pages (from-to)483-486
Number of pages4
JournalPhysics and Chemistry of Glasses
Volume46
Issue number4
StatePublished - Aug 2005

Fingerprint

tetrahedrons
Glass
glass
Diffraction
Germanium
ring structures
Fused silica
densification
anvils
Densification
diffraction
Raman spectroscopy
Q factors
germanium
breakdown
silicon dioxide
X rays
shift
cells
spectroscopy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Ceramics and Composites

Cite this

Mei, Q., Teredesai, P. V., Benmore, C. J., Sampath, S., Yarger, J., Bychkov, E., ... Lienenweber, K. (2005). The structure of permanently densified GeSe2 glasses. Physics and Chemistry of Glasses, 46(4), 483-486.

The structure of permanently densified GeSe2 glasses. / Mei, Q.; Teredesai, P. V.; Benmore, C. J.; Sampath, S.; Yarger, Jeffery; Bychkov, E.; Neuefeind, J.; Lienenweber, K.

In: Physics and Chemistry of Glasses, Vol. 46, No. 4, 08.2005, p. 483-486.

Research output: Contribution to journalArticle

Mei, Q, Teredesai, PV, Benmore, CJ, Sampath, S, Yarger, J, Bychkov, E, Neuefeind, J & Lienenweber, K 2005, 'The structure of permanently densified GeSe2 glasses', Physics and Chemistry of Glasses, vol. 46, no. 4, pp. 483-486.
Mei Q, Teredesai PV, Benmore CJ, Sampath S, Yarger J, Bychkov E et al. The structure of permanently densified GeSe2 glasses. Physics and Chemistry of Glasses. 2005 Aug;46(4):483-486.
Mei, Q. ; Teredesai, P. V. ; Benmore, C. J. ; Sampath, S. ; Yarger, Jeffery ; Bychkov, E. ; Neuefeind, J. ; Lienenweber, K. / The structure of permanently densified GeSe2 glasses. In: Physics and Chemistry of Glasses. 2005 ; Vol. 46, No. 4. pp. 483-486.
@article{5dec9c08213e4e9ba2d74db4edf007f3,
title = "The structure of permanently densified GeSe2 glasses",
abstract = "GeSe2 is an archetypal tetrahedral glass that differs from both vitreous silica and germania in that it forms a network of both edge and corner sharing tetrahedra with a substantial number of homopolar bonds at normal pressure. A combination of high energy diffraction measurements and Raman spectroscopy have been performed on glassy GeSe2 samples with densities of 3 and 4{\%} greater than the normal glass. The samples were pressurised in a multi-anvil cell and recovered to ambient pressure for the experiments. The higher density samples show a dramatic decrease in the first sharp diffraction peak height and shift to higher Q-values on densification. This is related to a breakdown of intermediate range order arising from the Ge-Ge interactions. X-ray difference functions suggest there is an increase in Ge-Ge corner sharing tetrahedra for the 4{\%} denser glass compared to the normal glass. The Raman data also show a decrease in ratio of edge sharing:corner sharing tetrahedra indicating a change in the distribution of large ring structures that form the glassy network.",
author = "Q. Mei and Teredesai, {P. V.} and Benmore, {C. J.} and S. Sampath and Jeffery Yarger and E. Bychkov and J. Neuefeind and K. Lienenweber",
year = "2005",
month = "8",
language = "English (US)",
volume = "46",
pages = "483--486",
journal = "Physics and Chemistry of Glasses",
issn = "0031-9090",
publisher = "Society of Glass Technology",
number = "4",

}

TY - JOUR

T1 - The structure of permanently densified GeSe2 glasses

AU - Mei, Q.

AU - Teredesai, P. V.

AU - Benmore, C. J.

AU - Sampath, S.

AU - Yarger, Jeffery

AU - Bychkov, E.

AU - Neuefeind, J.

AU - Lienenweber, K.

PY - 2005/8

Y1 - 2005/8

N2 - GeSe2 is an archetypal tetrahedral glass that differs from both vitreous silica and germania in that it forms a network of both edge and corner sharing tetrahedra with a substantial number of homopolar bonds at normal pressure. A combination of high energy diffraction measurements and Raman spectroscopy have been performed on glassy GeSe2 samples with densities of 3 and 4% greater than the normal glass. The samples were pressurised in a multi-anvil cell and recovered to ambient pressure for the experiments. The higher density samples show a dramatic decrease in the first sharp diffraction peak height and shift to higher Q-values on densification. This is related to a breakdown of intermediate range order arising from the Ge-Ge interactions. X-ray difference functions suggest there is an increase in Ge-Ge corner sharing tetrahedra for the 4% denser glass compared to the normal glass. The Raman data also show a decrease in ratio of edge sharing:corner sharing tetrahedra indicating a change in the distribution of large ring structures that form the glassy network.

AB - GeSe2 is an archetypal tetrahedral glass that differs from both vitreous silica and germania in that it forms a network of both edge and corner sharing tetrahedra with a substantial number of homopolar bonds at normal pressure. A combination of high energy diffraction measurements and Raman spectroscopy have been performed on glassy GeSe2 samples with densities of 3 and 4% greater than the normal glass. The samples were pressurised in a multi-anvil cell and recovered to ambient pressure for the experiments. The higher density samples show a dramatic decrease in the first sharp diffraction peak height and shift to higher Q-values on densification. This is related to a breakdown of intermediate range order arising from the Ge-Ge interactions. X-ray difference functions suggest there is an increase in Ge-Ge corner sharing tetrahedra for the 4% denser glass compared to the normal glass. The Raman data also show a decrease in ratio of edge sharing:corner sharing tetrahedra indicating a change in the distribution of large ring structures that form the glassy network.

UR - http://www.scopus.com/inward/record.url?scp=30744446717&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=30744446717&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:30744446717

VL - 46

SP - 483

EP - 486

JO - Physics and Chemistry of Glasses

JF - Physics and Chemistry of Glasses

SN - 0031-9090

IS - 4

ER -