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

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

doi:10.1006/jcht.1995.0116

Cited by 32 publications

(17 citation statements)

References 18 publications

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“…The standard enthalpy of formation from oxides of hydrated zeolite A (NIST Standard Reference Material 8851, (Na 2 O) 0.2530 (Al 2 O 3 ) 0.2508 (SiO 2 ) 0.4984 AE1.092H 2 O) is À74.2 ± 0.7 kJ/mol on TO 2 (T = Al or Si) basis (Cavanagh and Watters, 2006). The standard enthalpy of formation of ideal sodalite (Na 8 (Al 6 Si 6 O 24 )Cl 2 ) was reported previously (Komada et al, 1995). Using thermodynamic cycles shown in Table 2, the enthalpy of formation from oxides and sodium chloride of the ideal sodalite was determined as À75.0 ± 1.2 kJ/mol-TO 2 .…”

Section: Discussionmentioning

confidence: 99%

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Synthesis of nitrate sodalite: An in situ scanning calorimetric study

Navrotsky

2007

Geochimica et Cosmochimica Acta

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Section: Discussionmentioning

confidence: 99%

“…b Komada et al (1995). c On TO 2 (T = Al or Si) basis, the enthalpy of formation of ideal sodalite was calculated as À75.0 ± 1.2 kJ/mol.…”

Section: Discussionmentioning

confidence: 99%

Synthesis of nitrate sodalite: An in situ scanning calorimetric study

Navrotsky

2007

Geochimica et Cosmochimica Acta

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“…There are no published thermodynamic data for iodide sodalite. The Gibbs standard energy of formation for chloride sodalite [7] was therefore used. The equilibrium constant was derived from the difference of the Gibbs formation energy between before and after the following reaction: Na 8 (AlSiO 4 ) 6 Cl = 8Na + + 6Al 3+ + 6H 4 SiO 2 + 2Cl --24H + log K = 76.91…”

Section: Calculation Of Sodalite Solubilitymentioning

confidence: 99%

Iodine Immobilization by Sodalite Waste Form

et al. 2000

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Leachabilities and solubilities of the synthesized iodide sodalite and natural (chloride) sodalite were measured by leach test. The iodide sodalite was synthesized in nitrogen gas flow at 800°C for 2 hours. The crystalline structure of the product was certified by XRD analysis. The natural sodalite containing chlorine was obtained at Bancroft, Canada. The several types of solution were used to evaluate the influence of the solubility of sodalite that included the varied pH and the chemical compositions.The solubilities of chloride sodalite were calculated by the thermodynamics data. The solubility measured for the synthesized iodide sodalite was compared with that calculated. The solubility of the synthesized iodide sodalite was approximately 2 x 10 -4 mol/L, which shows a good agreement with the calculated one of the natural sodalite.

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“…The chemistry of high level waste with elevated silicon levels thermodynamically favors the formation of aluminosilicates. 7 The 2H Evaporator was scaled to the point that the concentrated evaporator bottoms could not be removed through normal steam lifting protocols.…”

Section: Introductionmentioning

confidence: 99%