Intermediate-range order in permanently densified GeO2 glass |
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Authors: | Sampath S Benmore C J Lantzky K M Neuefeind J Leinenweber K Price D L Yarger J L |
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Institution: | University of Wyoming, Department of Chemistry, Laramie, Wyoming 82071-3838, USA. |
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Abstract: | Information about the partial structure factors of densified GeO2 glass has been obtained from neutron and x-ray diffraction measurements. Densification causes a reduction in the length scale of the intermediate range order (IRO). The difference structure factors obtained by combining the x-ray and neutron data so as to eliminate one partial structure factor at a time shows the greatest effects when the Ge-Ge correlations are eliminated and least when O-O correlations are eliminated. This implies that the reduced length scale results from a decrease in the next-nearest neighbor Ge-O and O-O distance caused by a rotation about the Ge-O-Ge bonds and a distortion of the GeO4 tetrahedra. |
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