The site distribution in CdF2:Eu3+ has been studied as a function of dopant concentration and annealing temperature by site selective spectroscopy. A total of 17 sites have been identified. Their behavior is very different from rare earth doped CaF2. The cubic site increases with Eu3+ concentration until clusters form after which it levels off. There are no sites attributed to associated rare earth–F′i. The anomalous behavior observed in CaF2 as a function of annealing temperature and dopant concentration is not observed.
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Mho et al. (1982) studied this question.
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