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The origin of the main satellites observed in the luminescence R 1 and R 2 spectra of Cr 3+ in melt-grown YAG is discussed and it is shown that the regular intensity ratio 1:3:3 of these satellites is consistent with a model accounting for the perturbing effect of a Y 3+ ion in an anomalous octahedral a-site.
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Lupeǐ et al. (1993) studied this question.
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