A COMPREHENSIVE VIEW OF THE LOCAL-STRUCTURE AROUND RB IN RUBIDIUM GERMANATE GLASSES

A description of the local structure around Rb atoms in rubidium germa nate glasses is obtained using: extended X-ray absorption fine structu re analysis for interatomic bond distance, coordination number, and to pological disorder; X-ray photoelectron spectroscopy for the distribut ion of electron density; infrared spectroscopy for the strength of var ious bonds; and Rb-87 nuclear magnetic resonance spectroscopy for char ge distribution around Rb nucleus. The results describe the nature and origin of compositional, spatial and bond strength distribution and h omogeneity in the structure.