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Citation: ZHANG Jing-Nan, TAN Zhi-Cheng, LIU Bei-Ping, SHI Quan, TONG Bo. Low-Temperature Heat Capacities and Thermochemistry Properties of Sm(Val)Cl₃·6H₂O[J]. Acta Physico-Chimica Sinica, ;2008, 24(08): 1378-1382. doi: 10.3866/PKU.WHXB20080809 shu

Low-Temperature Heat Capacities and Thermochemistry Properties of Sm(Val)Cl₃·6H₂O

1.
Thermochemistry Laboratory, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning Province, P. R. China; Department of Chemistry and Chemical Engineering, Hunan University of Arts and Science, Changde 415000, Hunan Province, P. R. China; Graduate School of the Chinese Academy of Sciences, Beijing 100049, P. R. China

Received Date: 4 March 2008
Available Online: 6 June 2008

Heat capacities of the complex of rare-earth element with valine [Sm(Val)Cl3·6H2O] were measured with a high-precision automatic adiabatic calorimeter over the temperature range from 80 to 376 K, and the thermodynamic unctions (HT-H298.15 and ST-S298.15) were calculated. A large step in heat capacity was detected around 308Kand this may be attributed to a glass transition corresponding to freezing of structural disorder. Thermal decomposition of this complex as studied by thermogravimetric (TG) technique and a possible mechanism for the decomposition was suggested.
- Rare-earth complex; Sm(Val)Cl3·6H2O; Low-temperature heat capacity; Thermodynamic functions; TG analysis
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Low-Temperature Heat Capacities and Thermochemistry Properties of Sm(Val)Cl3·6H2O

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Low-Temperature Heat Capacities and Thermochemistry Properties of Sm(Val)Cl₃·6H₂O