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Emission and absorption properties of RbPb2Cl5 crystals are reported for the first time at the temperature 4.2 to 300 K. The lowest energy absorption peak at 275 nm is ascribed to a cationic exciton at Pb2+ site analogically to PbCl2. Two emission bands are found peaking at 340 and 510 nm under excitation in the exciton absorption region. They are ascribed to radiative decay of the cationic exciton at two different minima of excited APES at the Pb2+ ion. A comparison of RbPb2Cl5 emission properties with those of PbCl2 and RbCl:Pb is made.
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Nikl et al. (1991) studied this question.
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