Formation and structure of a dense octahedral glass

DOI	Resolve DOI: https://doi.org/10.1103/PhysRevLett.93.115502
Author	Search for: Guthrie, M.; Search for: Tulk, C.; Search for: Benmore, C.; Search for: Xu, J.; Search for: Yarger, J.; Search for: Klug, Dennis¹; Search for: Tse, J.; Search for: Mao, H-k; Search for: Hemley, R.
Affiliation	National Research Council of Canada. NRC Steacie Institute for Molecular Sciences
Format	Text, Article
Abstract	We 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	2004
In	Physical Review Letters 93, no. 11: 115502–.
Language	English
Peer reviewed	Yes
NPARC number	12339137
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Record identifier	beb45c7f-1cea-411f-b510-9304c04b305d
Record created	2009-09-11
Record modified	2020-04-17