Abstract
The formation and structure of GeO2, dense octahedral and high pressure glass, were analyzed. The study was carried out by using x-ray and neutron-diffraction measurements and molecular dynamics simulation under pressure effects. It was observed that the structures with a constant average coordination of ∼ 5, indicating a metastable, intermediate form of the glass. It was also observed that, the pressure-induced changes in GeO 2 probably result from a decrease in size and eventual collapse of the ambient-pressure cage structures as the network was compacted.
| Original language | English |
|---|---|
| Article number | 115502 |
| Pages (from-to) | 115502-1-115502-4 |
| Journal | Physical Review Letters |
| Volume | 93 |
| Issue number | 11 |
| DOIs | |
| State | Published - Sep 10 2004 |
Funding
The SNS is managed by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 for the U.S. DOE, and the U.S. DOE Contract No. W31109ENG 38 was used for measurements at IPNS and APS, ANL. The work at Carnegie was supported by the NSF and DOE (CDAC). We also acknowledge the support of Y. Ren on BESSRC and the staff at Sectors 11 and 13. We also wish to thank J. Neuefeind, D. L. Price, S. Sampath, J. Siewenie and J. Burley.