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Title: Low temperature heat capacity and thermodynamic functions of anion bearing sodalites Na 8Al 6Si 6O 24X 2 (X = SO 4, ReO 4, Cl, I)

Heat capacities of sulfate, perrhenate, chloride, and iodide sodalites with the ideal formula Na 8Al 6Si 6O 24X 2 (X = SO 4, ReO 4, 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 (NaReO 4) was measured.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [1] ;  [2]
  1. Brigham Young Univ., Provo, UT (United States)
  2. Univ. of California, Davis, CA (United States). Peter A. Rock Thermochemistry Lab.
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  4. Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)
Publication Date:
Grant/Contract Number:
AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Journal of Chemical Thermodynamics
Additional Journal Information:
Journal Volume: 114; Journal ID: ISSN 0021-9614
Publisher:
Elsevier
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Spallation Neutron Source (SNS)
Sponsoring Org:
USDOE Office of Environmental Management (EM)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Sodalite; Technetium; Rhenium
OSTI Identifier:
1361348