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

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

doi:10.1006/jcht.1995.0116

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

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

Geochemistry & Interfacial Science

Research output: Contribution to journal › Article › peer-review

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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 at T≈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·R at T=298.15 K. The enthalpy of solution of sodalite was measured in 2PbO·B₂O₃(l) at T=973 K with a Calvet-type calorimeter. The value of Δ_solH°_m(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)Cl₂ are -(1618.6±1.9)·10³·R·K and -(1527.9±2.0)·10³·R·K, respectively.

Original language	English
Pages (from-to)	1119-1132
Number of pages	14
Journal	Journal of Chemical Thermodynamics
Volume	27
Issue number	10
DOIs	https://doi.org/10.1006/jcht.1995.0116
State	Published - Oct 1995

Funding

We acknowledge the cooperation of G[ R[ He}reich and Z[ Sharp in providing suggestions\ that of F[ Haynes in the ~uid inclusion analysis\ and of E[ J[ Essene for having suggested the need for the endeavor and in the provenance of the samples[ We appreciate the _nancial support of the National Science Foundation through projects EAR!7998427 to E[ J[ Essene and E[ F[ Westrum\ Jr[ and EAR!7397057 to E[ J[ Essene[

Funders	Funder number
National Science Foundation

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@article{6dea7fe105ce4c1ea5b3ac9c9b4cdba0,

title = "Thermodynamic properties of sodalite at temperatures from 15 K to 1000 K",

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 at T≈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·R at T=298.15 K. The enthalpy of solution of sodalite was measured in 2PbO·B2O3(l) at T=973 K with a Calvet-type calorimeter. The value of ΔsolH°m(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)Cl2 are -(1618.6±1.9)·103·R·K and -(1527.9±2.0)·103·R·K, respectively.",

author = "Norikazu Komada and Westrum, {Edgar F.} and Hemingway, {Bruce S.} and Zolotov, {Mikhail Yu} and Semenov, {Yury V.} and Khodakovsky, {Igor L.} and Anovitz, {Lawrence M.}",

year = "1995",

month = oct,

doi = "10.1006/jcht.1995.0116",

language = "English",

volume = "27",

pages = "1119--1132",

journal = "Journal of Chemical Thermodynamics",

issn = "0021-9614",

publisher = "Elsevier",

number = "10",

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TY - JOUR

T1 - Thermodynamic properties of sodalite at temperatures from 15 K to 1000 K

AU - Komada, Norikazu

AU - Westrum, Edgar F.

AU - Hemingway, Bruce S.

AU - Zolotov, Mikhail Yu

AU - Semenov, Yury V.

AU - Khodakovsky, Igor L.

AU - Anovitz, Lawrence M.

PY - 1995/10

Y1 - 1995/10

N2 - 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 at T≈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·R at T=298.15 K. The enthalpy of solution of sodalite was measured in 2PbO·B2O3(l) at T=973 K with a Calvet-type calorimeter. The value of ΔsolH°m(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)Cl2 are -(1618.6±1.9)·103·R·K and -(1527.9±2.0)·103·R·K, respectively.

AB - 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 at T≈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·R at T=298.15 K. The enthalpy of solution of sodalite was measured in 2PbO·B2O3(l) at T=973 K with a Calvet-type calorimeter. The value of ΔsolH°m(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)Cl2 are -(1618.6±1.9)·103·R·K and -(1527.9±2.0)·103·R·K, respectively.

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U2 - 10.1006/jcht.1995.0116

DO - 10.1006/jcht.1995.0116

M3 - Article

AN - SCOPUS:0001518387

SN - 0021-9614

VL - 27

SP - 1119

EP - 1132

JO - Journal of Chemical Thermodynamics

JF - Journal of Chemical Thermodynamics

IS - 10

ER -

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

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