Low temperature heat capacity and thermodynamic functions of anion bearing sodalites Na8Al6Si6O24X2 (X = SO4, ReO4, Cl, I)

Jacob Schliesser, Kristina Lilova, Eric M. Pierce, Lili Wu, David M. Missimer, Brian F. Woodfield, Alexandra Navrotsky

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

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 languageEnglish (US)
Pages (from-to)14-24
Number of pages11
JournalJournal of Chemical Thermodynamics
Volume114
DOIs
StatePublished - Nov 2017
Externally publishedYes

Keywords

  • Entropy
  • Gibbs energy
  • Heat capacity
  • Radioactive waste
  • Sodalite

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Physical and Theoretical Chemistry

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