Thermochemical study of gaseous salts of oxygen-containing acids: XX. Germanium salts

Лопатин, С. И.; Шугуров, С. М.; Panin, A. I.; Emelyanova, Ksenia A.

doi:10.1134/s1070363215070026

Cited by 4 publications

(3 citation statements)

References 35 publications

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“…The other major channel to produce free molecules is evaporation of the intact native molecules from the melted/heated sample. In the latter case thermodynamic equilibrium studies [13,14,16] would matter and the heavier 4-atomic CaBO 2 could be more probable than CaBO*. Thus one of the probable molecular species present in danburite and datolite LIP is the CaBO 2 + molecule.…”

Section: Calcium-and Boron-bearing Mineralsmentioning

confidence: 97%

Boron- and iron-bearing molecules in laser-induced plasma

Gaft¹,

Nagli²,

Eliezer³

et al. 2015

Spectrochimica Acta Part B: Atomic Spectroscopy

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Section: Calcium-and Boron-bearing Mineralsmentioning

confidence: 97%

Boron- and iron-bearing molecules in laser-induced plasma

Gaft¹,

Nagli²,

Eliezer³

et al. 2015

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…In the gas‐phase synthesis of gaseous salts, GeO exhibits amphoteric properties, acting as both a cation‐ and an anion‐forming oxide. The existence of gaseous BaGeO 2 , GePO 3 , GeWO 3 , GeWO 4 , GeW 2 O 7 , GeMoO 3 , GeMoO 4 , GeMo 2 O 7 , GeB 2 O 4 and GeNbO 3 is known.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic properties of gaseous BaSnO₂ and Ba₂O₂ studied by Knudsen effusion mass spectrometry

Emelyanova

Шугуров

Panin

et al. 2020

Rapid Comm Mass Spectrometry

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Rationale BaSnO3 is an interesting technical and industrial ceramic, with uses in many areas of electronic technology. Currently, there is great interest in this ceramic material because of its potential as a transparent conductive oxide. Due to its good chemical stability, it is also used as a surface processing material in the synthesis of electroluminophores. When heated, the stannates of alkaline earth metals can pass into the vapor phase with or without dissociation. Until the present investigation, gaseous salts where SnO plays the role of an anion‐forming oxide had been unknown. The formation enthalpy of gaseous Ba2O2 also needed to be determined. Methods Knudsen effusion mass spectrometry was used to determine the partial pressures of vapor species, equilibrium constants and enthalpies of the studied gas‐phase reactions, as well as the formation and atomization enthalpies of gaseous BaSnO2 and Ba2O2: a mixture of BaO and SnO2 was evaporated from a platinum effusion cell. For the evaporation of gold (pressure standard), a molybdenum effusion cell was used. A theoretical study of gaseous BaSnO2 and Ba2O2 was performed by several quantum chemistry methods. Results Ba, BaO, Ba2O2, SnO and BaSnO2 were found to be the main species in the vapor over the BaO–SnO2 mixture in the temperature range of 1680–1920 K. The standard formation enthalpies of gaseous BaSnO2 and Ba2O2 were determined on the basis of the equilibrium constants of the studied gas‐phase reactions. Energetically favorable structures of these gaseous species were found and vibrational frequencies were evaluated in the harmonic approximation. The formation enthalpy of gaseous Ba2O2 was clarified; in addition, the formation enthalpies of gaseous SrSnO3 and CaSnO3 were estimated. Conclusions The thermal stability of gaseous BaSnO2 was confirmed by Knudsen effusion mass spectrometry. The reaction enthalpies of gaseous BaSnO2 from gaseous barium and tin oxides were theoretically evaluated and the obtained values were found to be in reasonable agreement with the experimental ones.

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“…By now existence and stability of gaseous europium, gallium, indium, germanium, tin, lead, some 3d‐elements, alkali, and alkali earth phosphates were reported.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic properties of gaseous cerium phosphate studied by Knudsen effusion mass spectrometry

2019

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Gaseous CePO2 has been identified by Knudsen effusion mass spectrometry during vaporization of CeO2 and magnesium diphosphate from tungsten double, two‐temperature effusion cell. Structure and molecular parameters of gaseous cerium phosphate under study were determined using quantum chemical calculations. On the basis of equilibrium constants measured for gas‐phase reaction, standard formation enthalpy of CePO2 was determined to be −508 ± 41 kJ ⋅ mol−1 at the temperature 298 K.

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Thermochemical study of gaseous salts of oxygen-containing acids: XX. Germanium salts

Abstract: Reactions of the gas-phase synthesis of germanium vanadate, borate, and molybdate have been studied. Standard enthalpies of formation and atomization of gaseous salts GeV 2 O 6 , GeB 2 O 4 , and SnMo 2 O 7 have been determined.

Cited by 4 publications

References 35 publications

Boron- and iron-bearing molecules in laser-induced plasma

Boron- and iron-bearing molecules in laser-induced plasma

Thermodynamic properties of gaseous BaSnO₂ and Ba₂O₂ studied by Knudsen effusion mass spectrometry

Thermodynamic properties of gaseous cerium phosphate studied by Knudsen effusion mass spectrometry

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Thermochemical study of gaseous salts of oxygen-containing acids: XX. Germanium salts

Abstract: Reactions of the gas-phase synthesis of germanium vanadate, borate, and molybdate have been studied. Standard enthalpies of formation and atomization of gaseous salts GeV 2 O 6 , GeB 2 O 4 , and SnMo 2 O 7 have been determined.

Cited by 4 publications

References 35 publications

Boron- and iron-bearing molecules in laser-induced plasma

Boron- and iron-bearing molecules in laser-induced plasma

Thermodynamic properties of gaseous BaSnO2 and Ba2O2 studied by Knudsen effusion mass spectrometry

Thermodynamic properties of gaseous cerium phosphate studied by Knudsen effusion mass spectrometry

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Thermodynamic properties of gaseous BaSnO₂ and Ba₂O₂ studied by Knudsen effusion mass spectrometry