DOI > 10.5291/ILL-DATA.6-05-922

This proposal is publicly available since 07/17/2018


Structure of Intermediate Phase Glasses


The objective of this proposal is to measure the full set of partial structure factors for two glasses, GeSe3 and GeSe4, that mark the boundaries of the so-called intermediate phase in the Ge-Se glass-forming system. The intermediate phase is common to a wide variety of network glass-forming systems and represents a range of compositions for which the network is deemed to self-organize on glass formation to give a rigid system that is optimally constrained to avoid stress. The results will provide the maximum information on the structure of these glasses that can be made available by using diffraction experiments, and will therefore give unprecedented insight into the structural signatures of the intermediate phase. In particular, they will provide the information that is required (e.g. on homopolar bond distances and coordination numbers) to distinguish between the various structural models that have been proposed. The new diffraction results will inform and be complemented by on-going first principles simulations. Additional information will be provided by new 73Ge and 77Se MAS NMR experiments.

Experimental Report

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Data Citation

The recommended format for citing this dataset in a research publication is in the following format:

SALMON Philip Stephen; Henry E. Fischer; PIZZEY Keiron; POLIDORI Annalisa; ROWLANDS Ruth and ZEIDLER Anita. (2013). Structure of Intermediate Phase Glasses. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.6-05-922

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Experiment Parameters

  • Environment temperature

  • Experiment energy

    0.5 A
  • Experiment moment

    0.4 - 23.5 A-1

Sample Parameters

  • Formula

    • GeSe3 or GeSe4 with 70Ge, 73Ge and 76Se isotopes
  • Consistence

  • Mass

  • Container

    cylindrical vanadium can