کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6476854 | 1426199 | 2017 | 11 صفحه PDF | دانلود رایگان |
- Heat capacities of sulfate, perrhenate, chloride, and iodide sodalites were measured from 2Â K to 300Â K.
- Heat capacities were fitted to equations in three temperature ranges.
- Standard entropies and Gibbs energies were calculated.
- All four sodalites undergo a phase transition below room temperature for which thermodynamic parameters were determined.
- This work is relevant to nuclear waste disposal.
Heat capacities of sulfate, perrhenate, chloride, and iodide sodalites with the ideal formula Na8Al6Si6O24X2 (XÂ =Â SO4, ReO4, Cl, I) were measured from 2Â K to 300Â K using a Quantum Design Physical Property Measurement System (PPMS). From the heat capacity data, the standard thermodynamic functions were determined. All four sodalites undergo a phase transition below room temperature for which thermodynamic parameters were determined. Additionally, the heat capacity of one of the constituent compounds (NaReO4) was measured.
Journal: The Journal of Chemical Thermodynamics - Volume 114, November 2017, Pages 14-24