Issue 22, 2013

Unraveling the atomic structure of Ge-rich sulfide glasses

Abstract

In contrast to the well-established structure of glassy GeS2, consisting of corner- and edge-sharing GeS4/2 tetrahedra, the structural features of Ge-rich sulfide alloys remain essentially unknown. Two contrasting points of view: (1) a tetrahedral model, and (2) a distorted NaCl approach were neither confirmed nor excluded mostly because of missing advanced structural studies. Using high-energy X-ray scattering and neutron diffraction, we show the complexity of the short and intermediate range order in GexS1−x glasses, ⅓ ≤ x ≤ 0.47, formed by corner- and edge-sharing tetrahedra with two-fold coordinated sulfur species and a variable number of Ge–Ge bonds, and Ge–S units with three-fold coordinated sulfur at x ≥ 0.36.

Graphical abstract: Unraveling the atomic structure of Ge-rich sulfide glasses

Article information

Article type
Paper
Submitted
05 Feb 2013
Accepted
05 Apr 2013
First published
08 Apr 2013

Phys. Chem. Chem. Phys., 2013,15, 8487-8494

Unraveling the atomic structure of Ge-rich sulfide glasses

A. Bytchkov, G. J. Cuello, S. Kohara, C. J. Benmore, D. L. Price and E. Bychkov, Phys. Chem. Chem. Phys., 2013, 15, 8487 DOI: 10.1039/C3CP50536G

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