Thermodynamic properties of sodalite at temperatures from 15 K to 1000 K

Norikazu Komada, Edgar F. Westrum,, Bruce S. Hemingway, Mikhail Zolotov, Yury V. Semenov, Igor L. Khodakovsky, Lawrence M. Anovitz

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The heat capacity of sodalite was measured with a computerized adiabatic calorimetric system at temperatures from 15 K to 350 K and with a d.s.c. from 340 K to 1000 K. No anomalies were observed over the entire range except for a peak atT≈250 K associated with fusion of NaCl(aq) fluid inclusions. The temperature of the spontaneous freezing of the fluid inclusions was remarkably reproducible, and the metastable liquid phase persisted fromT=250 K to 200 K upon cooling. The standard molar entropy for the end-member composition: Na8(Al6Si6O24)Cl2 is 102.0·RatT=298.15 K. The enthalpy of solution of sodalite was measured in 2PbO·B2O3(l) atT=973 K with a Calvet-type calorimeter. The value of Δsolm(973 K) is (58.98±0.71)·103·R·K. The calculated standard molar enthalpy and standard molar Gibbs free energy of formation for Na(Al6Si6O24)Cl2are -(1618.6±1.9)·103·R·K and -(1527.9±2.0)·103·R·K, respectively.

Original languageEnglish (US)
Pages (from-to)1119-1132
Number of pages14
JournalThe Journal of Chemical Thermodynamics
Volume27
Issue number10
DOIs
StatePublished - Oct 1995
Externally publishedYes

Fingerprint

sodalite
Thermodynamic properties
thermodynamic properties
Enthalpy
enthalpy
inclusions
Fluids
fluids
energy of formation
Gibbs free energy
Calorimeters
Freezing
Temperature
freezing
Specific heat
calorimeters
temperature
liquid phases
Entropy
Fusion reactions

ASJC Scopus subject areas

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

Cite this

Komada, N., Westrum, E. F., Hemingway, B. S., Zolotov, M., Semenov, Y. V., Khodakovsky, I. L., & Anovitz, L. M. (1995). Thermodynamic properties of sodalite at temperatures from 15 K to 1000 K. The Journal of Chemical Thermodynamics, 27(10), 1119-1132. https://doi.org/10.1006/jcht.1995.0116

Thermodynamic properties of sodalite at temperatures from 15 K to 1000 K. / Komada, Norikazu; Westrum, Edgar F.; Hemingway, Bruce S.; Zolotov, Mikhail; Semenov, Yury V.; Khodakovsky, Igor L.; Anovitz, Lawrence M.

In: The Journal of Chemical Thermodynamics, Vol. 27, No. 10, 10.1995, p. 1119-1132.

Research output: Contribution to journalArticle

Komada, N, Westrum, EF, Hemingway, BS, Zolotov, M, Semenov, YV, Khodakovsky, IL & Anovitz, LM 1995, 'Thermodynamic properties of sodalite at temperatures from 15 K to 1000 K', The Journal of Chemical Thermodynamics, vol. 27, no. 10, pp. 1119-1132. https://doi.org/10.1006/jcht.1995.0116
Komada, Norikazu ; Westrum, Edgar F. ; Hemingway, Bruce S. ; Zolotov, Mikhail ; Semenov, Yury V. ; Khodakovsky, Igor L. ; Anovitz, Lawrence M. / Thermodynamic properties of sodalite at temperatures from 15 K to 1000 K. In: The Journal of Chemical Thermodynamics. 1995 ; Vol. 27, No. 10. pp. 1119-1132.
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