Abstract: Abstract Extended X-ray absorption fine structure has been obtained to determine the interatomic distance, R, coordination number (CN) and degree of disorder, Δσ2, around the mobile alkali (K), as well as the network forming (Ge) cations of binary xK2O · (1 − x)GeO2 glasses with x=0.247. The spectra were measured at around liquid helium temperature to eliminate the thermal contribution to the observed structural disorder. For all x ≤ 0.2, non-bridging oxygens (NBOs) are produced, as well as GeO6 with the addition of K2O. For x > 0.2, NBO...
(read more)
Topics: 
Crystallography