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Y3Ga5O12 powder doped with Cr3+ ions was prepared, and was characterized by powder X-ray diffraction analysis. Typical absorption spectra of Cr3+ in octahedral symmetry contained several spin-allowed absorption bands, of which four were usually well resolved. Absorption bands at 268, 373, 438, and 612 nm were assigned to the 4A2g (F) → 4T1g (P), 4A2g (F) → 2A1g (G), 4A2g (F) → 4T1g (F), and 4A2g (F) → ...
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