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Zeitschrift für Physikalische Chemie

International journal of research in physical chemistry and chemical physics

Editor-in-Chief: Rademann, Klaus


IMPACT FACTOR 2017: 1.144
5-year IMPACT FACTOR: 1.144

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Online
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2196-7156
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Volume 230, Issue 3

Issues

Structure of Glassy Ag–Ge–Se by Neutron Diffraction with Isotope Substitution

Anita Zeidler / Philip Stephen Salmon / Andrea Piarristeguy
  • Institut Charles Gerhardt, UMR 5253 CNRS, CC 1503, Université de Montpellier, Pl. E. Bataillon, F-34095, Montpellier Cedex 5, France
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Annie Pradel
  • Institut Charles Gerhardt, UMR 5253 CNRS, CC 1503, Université de Montpellier, Pl. E. Bataillon, F-34095, Montpellier Cedex 5, France
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Henry Edward Fischer
Published Online: 2016-01-12 | DOI: https://doi.org/10.1515/zpch-2015-0727

Abstract

The structure of glassy Ag0.077Ge0.212Se0.711, which lies at y = 0.077 on the Agy(Ge0.23Se0.77)1−y tie-line, was investigated by using the method of neutron diffraction with silver isotope substitution. Two glass transition temperatures were found from a characterisation of the material using modulated differential scanning calorimetry, which indicates a mixed phase material. The diffraction method provides site-specific information on the Ag coordination environment, and gives an average of 3.5(1) Ag–Se nearest-neighbours with a bond distance of 2.65(1) Å together with 0.9(1) Ag–Ag next nearest-neighbours at a distance of 2.9(2) Å. The incorporation of silver does not appear to have a marked effect on the coordination number of Se to other matrix (Ge or Se) atoms, which supports the notion that Ag forms dative bonds with Se lone-pair electrons. A model is given for predicting the change in the Se to matrix atom coordination number when a monovalent metal such as Ag is added to a Se rich Ge–Se base glass.

Keywords: Glass Structure; Neutron Diffraction; Isotope Substitution; Differential Scanning Calorimetry

About the article

Accepted: 2015-11-24

Received: 2015-11-02

Published Online: 2016-01-12

Published in Print: 2016-03-28


Citation Information: Zeitschrift für Physikalische Chemie, Volume 230, Issue 3, Pages 417–432, ISSN (Online) 2196-7156, ISSN (Print) 0942-9352, DOI: https://doi.org/10.1515/zpch-2015-0727.

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[1]
A. Piarristeguy, R. Le Parc, M. Ramonda, R. Escalier, I. Grillo, G.J. Cuello, V. Cristiglio, and A. Pradel
Journal of Alloys and Compounds, 2018
[2]
Anita Zeidler, Philip S. Salmon, Dean A. J. Whittaker, Andrea Piarristeguy, Annie Pradel, Henry E. Fischer, Chris J. Benmore, and Ozgur Gulbiten
Royal Society Open Science, 2018, Volume 5, Number 1, Page 171401
[3]
Anup Pandey, Parthapratim Biswas, and D. A. Drabold
Scientific Reports, 2016, Volume 6, Number 1

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