1955
DOI: 10.1002/zaac.19552810106
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Über die thermischen Verhältnisse im System Natrium–Schwefel–Sauerstoff

Abstract: Auf Grund der Ergebnisse von Schmelzversuchen wurde das ternäre Zustandsdiagramm Na2SNa2ONa2SO4 einschließlich seiner binären Randsysteme aufgestellt. Die binären Randsysteme stellen einfach eutektische Systeme dar; dementsprechend weist das Gesamtsystem auch eutektische Erstarrung (620°C) auf.

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Cited by 15 publications
(5 citation statements)
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“…Several investigations of the phase diagram of (Na 2 SO 4 + Na 2 S) have been made [26,[32][33][34][35][36]. There is a notable scatter in the experimental results, most likely due to difficulties in synthesizing Na 2 S of high purity and also due to the possible oxidation of Na 2 S during the experiments.…”
Section: (Na 2 So 4 + Na 2 S)mentioning
confidence: 99%
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“…Several investigations of the phase diagram of (Na 2 SO 4 + Na 2 S) have been made [26,[32][33][34][35][36]. There is a notable scatter in the experimental results, most likely due to difficulties in synthesizing Na 2 S of high purity and also due to the possible oxidation of Na 2 S during the experiments.…”
Section: (Na 2 So 4 + Na 2 S)mentioning
confidence: 99%
“…At high temperatures a solid solution with hexagonal FIGURE 4. Plot of temperature against mole fraction to show the calculated phase diagram of (Na 2 SO 4 + Na 2 S) with experimental data from references [26,32,[34][35][36]. The calculated eutectic point is at .…”
Section: (K 2 Co 3 + K 2 So 4 )mentioning
confidence: 99%
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“…Experimental vapor-liquid equilibrium data are given in Table II with values of activity coefficients calculated from the relation 7/ = ,' * exp[v,L(P -P,*)/RT]\ (1) where the fugacity coefficients, , and *, were calculated by using the volume-explicit virial equation truncated after the second term and second virial coefficients estimated from the Hayden and O'Connell method (5). The virial coefficients are reported in Table II.…”
Section: Experimental Results and Correlationsmentioning
confidence: 99%
“…The liquid model considers two cations, Na + and K + , and two anions, SO 2À 4 and S 2 O 2À 7 . In reality, the liquid might also contain the anions S 3 O 2À 10 [6,18], O 2À and O 2À 2 [31][32][33], or dissolved molecular SO 3 [7], but it is expected that these species occur in very low concentrations in the (Na,K) 2 (SO 4 ,S 2 O 7 ) system, and therefore do not affect the chemical equilibrium to any great extent. The Gibbs free energy of the quadruplets is defined as follows: For the unary quadruplet containing two cations A and two anions X, the Gibbs free energy is defined as [30]:…”
Section: Thermodynamic Model For the Liquid Phasementioning
confidence: 98%