Intermediate-range order in permanently densified GeO2 glass.
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.
Sampath
S
S
University of Wyoming, Department of Chemistry, Laramie, Wyoming 82071-3838, USA.
Benmore
C J
CJ
Lantzky
K M
KM
Neuefeind
J
J
Leinenweber
K
K
Price
D L
DL
Yarger
J L
JL