Rare-earth perchlorate-glycine complex [Sm2(Gly)6(H2O)4] (ClO4)6· 5H2O was synthesized and obtained as single crystals. By using TG, DTA and chemical analytic method, and comparing with relavent literature, its single crystal structure was established. The purity was found to be 99.0%, with no distinct melting point. Heat capacity measurement of this compound was carried out on a high-precise fully- automated adiabatic calorimeter over the temperature range from 79 to 370K. No obvious thermal anomaly was observed. Thermal decomposition temperature range of this compound is near 348.07K, its decomposition temperature, decomposition enthalpy and entropy are 346.89K, 44.669 kJ/mol and 128.77J/K·mol, respectively. The polynomial equation of heat capacity of this compound has ve fitted as : Cp=1294.56K+624.17X- 11.893X^2 +75.075X^3+23.762X^4 in the temperature range of 79～318K. The standard enthalpy of formation was measured to be - 8022. 405kJ/mol with isoperable reaction calorimeter at 298.15K.

Key words: PERCHLORATE, GLYCINE, SAMARIUM COMPLEX, SPECIFIC HEAT, ENTHALPY OF FORMATION