The discovery of hydrogen bonding (H bonding) in irradiated LiF:OH crystals by IR spectra stimulated further investigation of the details of the IR spectra in L i F and other alkali halide crystals containing OH ions in a subsitutional position /1/.In Fig. 1 IR absorption spectra of a number of crystals before and after irradiation (Co60 r-radiation, I = 59 mA/kg, T = 300 K) are shown.Comparing the data of Fig. 1 and spectra of compound solutions with H bonding, it can be stated that wide bands in the range of 3700 t o 2500 cm" are caused by OH-group vs oscillations due to OH.. .X hydrogeneous bonding formation. This conclusion is also supported by the fact that this band be-
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