Studies of Chemical Bonding in Glasses by X‐Ray Emission Spectroscopy

摘要: Silicon and aluminum Kβ band X-ray emission spectra of a series lithia-aluminosilica (LAS) glasses were determined using the spectrometric systems commercially available electron microprobes. Comparison with reference materials, including glassy crystalline forms silica, high-quartz-phase crystals L:A:S-1:1:2 (mol ratio) composition (high-eucryptite), 6- 4-coordinated oxides, led to tentative assignment spectral peaks specific electronic transitions. Molecular orbital theory crystallographic structural data used assign bands in materials. The LAS glass indicated progressive bond weakening decreasing silica content; peak shifts permitted approximate calculation decreases Si–O Al–O energies, which as great 30 kcal/mol relative SiO2 (for glass).