کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6476854 1426199 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Low temperature heat capacity and thermodynamic functions of anion bearing sodalites Na8Al6Si6O24X2 (X = SO4, ReO4, Cl, I)
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Low temperature heat capacity and thermodynamic functions of anion bearing sodalites Na8Al6Si6O24X2 (X = SO4, ReO4, Cl, I)
چکیده انگلیسی


- Heat capacities of sulfate, perrhenate, chloride, and iodide sodalites were measured from 2 K to 300 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 (X = SO4, ReO4, Cl, I) were measured from 2 K to 300 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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Chemical Thermodynamics - Volume 114, November 2017, Pages 14-24
نویسندگان
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