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Figure 6
X-ray total radial-distribution functions T(r) up to 15 GPa describe changes in both the local and intermediate-range structure up to ∼6 Å. The peak that appears at 3 GPa at around 2.5 Å is identified as a new Ge–O correlation. Above the transition pressure of 6 GPa, the covalent Ge–O peak broadens significantly and is asymmetric at 7 GPa. At 10 GPa, the Ge–O peak again becomes more symmetric, and has shifted to higher r. The local correlations in the glass at 15 GPa closely resemble that of the crystalline rutile structure. Complementary neutron diffraction measurements were carried out in the same material (Guthrie et al., 2004BB61).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 12| Part 2| February 2005| Pages 135-154
doi:10.1107/S0909049504034417
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