43023-95-6Relevant articles and documents
Calorimetric study of rubidium hexafluoroarsenate at elevated temperatures
Sharpataya,Gavrichev,Khoroshilov,Plakhotnik
, p. 300 - 305 (2004)
The heat capacity of rubidium hexafluoroarsenate, RbAsF6, was measured from 300 to 700 K by differential scanning calorimetry. The results indicate that the structural transformation from the rhombohedral to the cubic phase occurs in the range 305-436 K through an intermediate stable phase and reaches isothermal completion in a narrow temperature range of 407-409 K. The enthalpy of the transformation is 10.90 ± 0.03 kJ/mol, and its entropy is 26.39 ± 0.08 J/(K mol) = Rln24, which suggests that this structural transition is of the order-disorder type. The heat capacity data are used to evaluate the thermodynamic properties of RbAsF6 in the range 300-700 K.
Low-temperature heat capacity of RbAsF6
Gavrichev,Gorbunov,Golushina,Totrova,Plakhotnik
, p. 778 - 780 (2008/10/08)
Heat capacity of RbAsF6 was measured in the temperature range 10-320 K by adiabatic calorimetry. No anomalies in heat capacity were observed. The following standard values of the thermodynamic parameters of RbAsF6 were obtained: Cp0 (298.15 K) = 173.8 ± 0.4 J/(mol K), S0(298.15 K) = 224.5 ± 0.5 J/(mol K), H0(298.15 K) - H0(0) = 31470 ± 70 J/mol, and Φ0(298.15 K) = 119.0 ± 0.2 J/(mol K).
