Abstract
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.
Original language | English |
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Pages (from-to) | 14-24 |
Number of pages | 11 |
Journal | Journal of Chemical Thermodynamics |
Volume | 114 |
DOIs | |
State | Published - Nov 2017 |
Keywords
- Entropy
- Gibbs energy
- Heat capacity
- Radioactive waste
- Sodalite