K X-Ray Absorption Spectra of Germanium in Crystalline and in Amorphous GeO2

The Ge K x-ray absorption spectrum was measured in three forms of GeO₂: hexagonal crystalline, tetragonal crystalline, and amorphous. From the measured results it is concluded that either the Kronig explanation of the extended fine structure observed in the spectra needs to be modified or the "glassy" GeO₂ is actually crystalline in character over small regions, i.e., the amorphous GeO₂ has a high degree of shortrange order identical to that of the hexagonal crystalline form.