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Formation and Structure of a Dense Octahedral Glass
2004
Physical Review Letters
We have performed in situ x-ray and neutron-diffraction measurements, and molecular dynamics simulations, of GeO 2 , 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
doi:10.1103/physrevlett.93.115502
pmid:15447351
fatcat:lusl5npn3bct5ip6igyskef7pe