Metamict Transformation of Silica

Ju Yin Cheng, Michael Treacy, P. J. Keblinski

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Alpha quartz can be transformed to a metamict phase in a physical reaction such as irradiation with fast ions, neutrons and electrons. As truly inspired by this fact, we design a simple experiment to produce disordered silica and at the same time watch the transformation using a transmission electron microscope. This work simply presents electron-damaged silica in dark, field at Bragg reflection. Since the transformation is not complete, disordered silica (at the sample edge) and retained quartz can be compared in each image. Not surprisingly, more speckles are found in the quartz than in the disordered structure. But it is too early to say no medium-range ordering in amorphous silica because the experiment only shows one Bragg diffraction. Systematic work to complete and measure the disordering again is being pursued.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium - Proceedings
EditorsJ.R. Abelson, G. Ganguly, H. Matsumura, J. Robertson, E.A. Schiff
Number of pages6
StatePublished - 2003
Externally publishedYes
EventMaterials Research Proceedings: Amorphous and Nanocrystalline Silicon-Based Films - 2003 - San Francisco, CA, United States
Duration: Apr 22 2003Apr 25 2003


OtherMaterials Research Proceedings: Amorphous and Nanocrystalline Silicon-Based Films - 2003
Country/TerritoryUnited States
CitySan Francisco, CA

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials


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