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  • 1 Department of Inorganic and General Chemistry, Faculty of Chemistry Marie Curie Sklodowska University 20-031 Lublin Poland
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The thermal decompositions of Y, La and lanthanide (from Ce(III) to Lu(III) benzene-1,2-dioxyacetates with general formula Ln2(C10H8O6)3·nH2O were studied. The hydrated complexes first lose water of crystallization in one or two steps to yield anhydrous compounds or hydrates containing coordination water molecules, and then decompose to the oxides Ln2O3, CeO2, Pr6O11 and Tb4O7 with formation of intermediates, carbonates and oxycarbonates (La, Pr-Eu), oxycarbonates (Y, Tb-Lu) or carbonate (Gd) only. Anhydrous cerium(III) benzene-1,2-dioxyacetate decomposes on heating directly to CeO2.