Thermochemical Data of Pure Substances

Barin, Ihsan

doi:10.1002/9783527619825

Cited by 3,144 publications

(2,902 citation statements)

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“…A trend, also followed by Ce 2 MnN 3 , reflects that the energetics of ternary nitride formation are dominated by the acid/base character of the cations in the ternary, as it was previously demonstrated in several examples [10±13]. (a) reference [19], (b) reference [33], and (c) reference [12] ±67.7 ± 6.6 ±137.5 ± 6.8 49% [12] …”

Section: Ternary Ce 2 Mnn 3 Nitridesupporting

confidence: 67%

Thermodynamics of Formation of Binary and Ternary Nitrides in the System Ce/Mn/N

Tessier

Ranade

Navrotsky

et al. 2001

Z. anorg. allg. Chem.

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Drop solution calorimetry in high-temperature oxide melts has been shown to be very useful to study the energetics of nitride formation. This methodology was used to determine the enthalpies of formation from the elements of binary and ternary nitrides in the Ce/Mn/N system. The resulting values in kJ mol ±1 are; DH f (CeN) = ±340.19 ± 6.80, D(H f (Mn 3 N 1.95 , g-Mn 3 N 2 type) = ±192.68 ± 7.57, DH f (Mn 6 N 5.40 , h-Mn 6 N 5 type) = ±430.80 ± 10.93 and DH f (Ce 2 MnN 3 ) = ±928.18 ± 9.46. The results show the role of inductive effects in Ce 2 MnN 3 leading to a higher energetic stability compared to binary components.

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Section: Ternary Ce 2 Mnn 3 Nitridesupporting

confidence: 67%

Thermodynamics of Formation of Binary and Ternary Nitrides in the System Ce/Mn/N

Tessier

Ranade

Navrotsky

et al. 2001

Z. anorg. allg. Chem.

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“…7) unter Beteiligung der Gasphasenspezies Bi g , Bi 2,g , Se g , Se 2,g , SeCl 2,g , Se 2 Cl 2,g , SeOCl 2,g , BiCl 3,g , BiCl g , Cl 2,g und Cl g [13,17] zeigt, erha È lt man dann fu È r die Bildung von BiSeO 3 Cl g unabha Èngig vom Reaktionsweg die mittleren Werte: Cp(BiSeO 3 Cl g ) = 24,7 ± 2,5 cal/mol K, S°(BiSeO 3 Cl g , 298) = 104,1 ± 9,5 cal/mol K.…”

Section: Introductionunclassified

Untersuchungen zum System BiOCl/SeO ₂

Oppermann

Huong

Zhang

et al. 2001

Z. anorg. allg. Chem.

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Professor Wolfgang Jeitschko zum 65. Geburtstag gewidmet Inhaltsu È bersicht. Auf dem quasibina È ren Schnitt BiOCl/SeO 2 wurde die Existenz nur einer terna È ren Verbindung BiOCl´SeO 2 = BiSeO 3 Cl nachgewiesen. Durch Gesamtdruckmessungen und DTA wurden das Zustandsbarogramm und das Zustandsdiagramm des Systems aufgestellt. Die bei Raumtemperatur stabile Phase a-BiSeO 3 Cl weist eine stark endotherme Umwandlung (a ® b) bei 400 ± 2°C und eine schwach endotherme Umwandlung (b ® c) bei 410 ± 3°C auf; die Verbindung schmilzt peritektisch bei 417 ± 3°C. Aus dem chemischen Transport von BiOCl f mit SeO 2,g und der Wanderung von BiSeO 3 Cl f im Temperaturgefa È lle folgt die Existenz der Gasspezies BiSeO 3 Cl. In Auswertung des Zersetzungsdruckes von BiSeO 3 Cl f , des Sa È ttigungsdruckes und des chemischen Transportes erha È lt man die Standardwerte:DH°B (a-BiSeO 3 Cl f , 298) = ±148,0 ± 2,8 kcal/mol, S°(a-BiSeO 3 Cl f , 298) = 41,0 ± 2,0 cal/mol K und DH°B(BiSeO 3 Cl g , 298) = ±102,7 ± 7,0 kcal/mol, S°(BiSeO 3 Cl g , 298) = 101,0 ± 5,0 cal/mol K. Durch Lo È sungskalorimetrie in 4 n HCl wurden hergeleitet:DH°B(a-BiSeO 3 Cl f , 298) = ±148,5 ± 1,4 kcal/mol und DH°B(b-BiSeO 3 Cl f , 298) = ±148,2 ± 1,4 kcal/mol Investigations on the System BiOCl/SeO 2 Abstract. The section BiOCl/SeO 2 was shown to be quasibinary one and include only one intermediate phase BiOCl´SeO 2 = BiSeO 3 Cl. The phase barogram and the phase diagram were determined by total pressure measurements and DTA. BiSeO 3 Cl shows on heating two transitions in crystal phase, (a ® b) at 400 ± 2°C and (b ® c) at 410 ± 3°C. The compound melts peritectically at 417 ± 3°C. The experiments on sublimation of BiSeO 3 Cl in the temperature gradient and chemical vapour transport with SeO 2 allowed to make the conclusion on the existence of BiSeO 3 Cl molecules in the vapour. Some standard thermodynamic data were determined by solution calorimetry and evaluated from the vapour pressure and chemical vapour transport rate data.(Data see Inhaltsu È bersicht)

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“…These values were calculated and tabulated according to the temperature in the 25Ϫ500°C range and involve all the possible Na-K-O combinations available in the literature. The primary thermodynamic data concern the values tabulated for the following species: K(s and l), KO 2 (s), K 2 O(s), K 2 O 2 (s); Na(s and l), NaO 2 (s), Na 2 O(s), Na 2 O 2 (s); O 2 (g), H 2 O(g), CO 2 (g) They were extracted from two recent data bases [20,21] or from the NIST files. [18] The HSC program was used for part of the calculations.…”

Section: Methodsmentioning

confidence: 99%

Reactions of Sodium-Potassium Alloys with Inert Gas Impurities − Potential Hazards after Oxidation

Desreumaux¹,

Calais²,

Adriano³

et al. 2000

Eur. J. Inorg. Chem.

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Thermochemical Data of Pure Substances

Cited by 3,144 publications

References 0 publications

Thermodynamics of Formation of Binary and Ternary Nitrides in the System Ce/Mn/N

Thermodynamics of Formation of Binary and Ternary Nitrides in the System Ce/Mn/N

Untersuchungen zum System BiOCl/SeO ₂

Reactions of Sodium-Potassium Alloys with Inert Gas Impurities − Potential Hazards after Oxidation

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Thermochemical Data of Pure Substances

Cited by 3,144 publications

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Thermodynamics of Formation of Binary and Ternary Nitrides in the System Ce/Mn/N

Thermodynamics of Formation of Binary and Ternary Nitrides in the System Ce/Mn/N

Untersuchungen zum System BiOCl/SeO 2

Reactions of Sodium-Potassium Alloys with Inert Gas Impurities − Potential Hazards after Oxidation

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Untersuchungen zum System BiOCl/SeO ₂