Topological controversies in the adaptability concept for glassy GERMANIUM SELENIDE (cas 12065-10-0)s

Add time:08/06/2019    Source:sciencedirect.com

Cluster modelling based on ab-initio calculations testifies lack of intermediate optimally-constrained phase in binary GexSe100-x system within expected reversibility window (20 ≤ × < 26) in terms of global connectivity. Network of these glasses within 20 ≤ × < 26 compositional range can be composed of over-constrained “outrigger raft” structural motives built of two edge- and four corner-shared GeSe4/2 tetrahedra interconnected via optimally-constrained ≡ Ge―Se―Se―Ge≡ bridges, extra Se atoms forming ring-like configurations instead of Se―Se dimers.

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