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The low-temperature (8 K) optical absorption, near-infrared photoluminescence (NIRPL) and photoluminescence excitation spectra (PLE) of MnO 4- and MnO 42- in the KI and RbI crystals are reported. The most intense low-energy absorption bands in visible region are assigned to ligand-to-metal charge transfer (LMCT) bands due to 1 A 1 -> 1 T ...
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