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  • 1 Department of Inorganic and General Chemistry, Institute of Chemistry M. Curie Sklodowska University 20-031 Lublin Poland
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The rare earth complexes with glycolic acid were prepared as crystalline solids with general formula [Ln(CH2OHCOO)3H2O]·nH2O, wheren=0 for La-Gd andn=2 for Y and Tb-Lu. During heating the monohydrates of La and Pr-Gd decomposed in two steps to Ln2O3 and Pr6O11, with intermediate formation of Ln2O2CO3; monohydrated Ce(III) glycolate decomposed directly to CeO2. The trihydrated glycolates of Y and Tb-Lu first lost two water molecules and the monohydrated complexes then decomposed to Ln2O3 and Tb4O7 through Ln2O2CO3.