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Abstract  

The thermal transformations of Pr and La carbonates, La, Ce, Pr, Nd, Sm, Eu and Gd fluorocarbonates, and La, Nd, Dy and Ho fluorooxalates were investigated. A Derivatograph Q-1000 (MOM, Hungary) was used for thermal analysis. The kinetics of the processes was studied in a flow reactor. The activation energies and preexponential factors for dehydration and decarbonization were calculated. Samples of Pr fluorocarbonate, Ho fluorooxalate, and Pr and La carbonates were exposed to γ-irradiation (dose from 6.2·106 to 6.1·107 rad). The influence of the irradiation dose upon the kinetic parameters (E a andA) of the processes was investigated.

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abietates . Zh Neorg Khim 31 : 640 – 642 . 37. Nagashima , K , Wakita , H , Mochizuki , A 1973 The synthesis of crystalline rare earth carbonates . Bull Chem Soc Jpn 46 : 152 – 156 10

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