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Two new lanthanide-pyridinetricarboxylic complexes formulated as [Lu(pyta)(H2O)3](1) and [La(pyta)· (H2O)2]·1.5H2O(2) were synthesized through hydrothermal reactions of LuCl3 or La(NO3)3·6H2O with pyridine-2,4,6-tricarboxylic acid(H3pyta),