Formation and Structure of a Dense Octahedral Glass

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DOIResolve DOI: http://doi.org/10.1103/PhysRevLett.93.115502
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TypeArticle
Journal titlePhysical review letters
Volume93
Issue11
Pages115502–; # of pages: 1
AbstractWe have performed in situ x-ray and neutron-diffraction measurements, and molecular dynamics simulations, of GeO2, an archetypal network-forming glass under pressure. Below 5 GPa, additional atoms encroaching on the first tetrahedral shell are seen to be a precursor of local coordination change. Between 6 and 10 GPa, we observe structures with a constant average coordination of ?5, indicating a new metastable, intermediate form of the glass. At 15 GPa, the structure of a fully octahedral glass has been measured. This structure is not retained upon decompression and, therefore, must be studied in situ.
Publication date
AffiliationNational Research Council Canada; NRC Steacie Institute for Molecular Sciences
Peer reviewedNo
NPARC number12339137
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Record identifierbeb45c7f-1cea-411f-b510-9304c04b305d
Record created2009-09-11
Record modified2016-05-09
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