Topological changes in glassyGeSe2at pressures up to9.3GPadetermined by high-energy x-ray and neutron diffraction measureme

The structure of densified As2O3 glasses

“…The changes associated with the principal peak are fully reversible during decompression but the FSDP is only partially recovered. Future in situ high energy X-ray diffraction experiments using a micro-focused beam and a diamond anvil cell would be advantageous, of the type recently reported for glassy GeSe 2 [11].…”

“…In this paper, we extend our previous work on investigating the effect of pressure on the structure of several tetrahedral glassy networks: GeO 2 [9,10], GeSe 2 [11] and amorphous ice [12], to the effect of pressure on a trigonal glassy network, namely that of As 2 O 3 . …”

Helium penetrates into silica glass and reduces its compressibility

“…The volume change (V/V 0 ) was determined by measuring the change in the size of the bulk sample in optical-microscope images 5,20 . Typical images are shown in Figure 1.…”

Structure of liquids and glasses in the Ge–Se binary system

“…Monochromatic high-energy X-ray diffraction measurements employing micro-focusing optics were recently performed on glassy GeSe 2 in a diamond anvil cell at pressures up to 9.3 GPa [10]. In these experiments the measured total structure factor closely approximates the N-N partial structure factor since the atomic form factors of Ge and Se are comparable.…”

“…In this paper the primary focus will be on the information that can be gained on the partial structure factors of Ge-Se compounds by applying neutron diffraction methods although results from recent high-energy X-ray diffraction work on glassy GeSe 2 at high pressure will also be given [10]. The information presented therefore complements other experimental studies on the composition, temperature and pressure dependence of the structure of Ge-Se compounds.…”