Abstract
The available information concerning the distribution of hydroxide ions in alkali halide crystals is reviewed. The various possible reactions among the hydroxide ions and divalent cation impurities and their accompanying charge compensating cation vacancies are given and discussed in terms of the available ionic conductivity and optical absorption data. The possible hydroxide ion complexes are discussed in terms of ESR results. Complexes containing hydroxide ions, each on their own anion site, with cation impurities and vacancies on adjacent sites are indicated as being the most probable to occur. Different geometries of such a complex are discussed in terms of the available experimental data.
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