Gaseous titanium molybdates and tungstates: Thermodynamic properties and structures

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

doi:10.1002/rcm.7059

Cited by 8 publications

(9 citation statements)

References 51 publications

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“…The KEMS experiments were carried out using the Knudsen effusion technique combined with the mass spectrometric analysis of vapor composition described in detail elsewhere using an MS‐1301 mass spectrometer (Design Bureau, Academy of Science, St Petersburg, Russia). This mass spectrometer has a homogeneous magnetic sector analyzer with a deflection angle of ions of 90°.…”

Section: Methodsmentioning

confidence: 99%

“…The KEMS experiments were carried out using the Knudsen effusion technique combined with the mass spectrometric analysis of vapor composition described in detail elsewhere 20,21 For the gaseous synthesis of the sulfosalt, a double twotemperature cell was employed. 8,[21][22][23] This cell consists of two sections linked by a tube (Figure 2), with the upper part heated by a resistance furnace and the lower part by heat transfer.…”

Section: Knudsen Effusion Mass Spectrometry (Kems)mentioning

confidence: 99%

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Thermochemical study of gaseous indium–arsenic sulfosalt

Шугуров

Panin

Лопатин

et al. 2019

Rapid Comm Mass Spectrometry

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Rationale Sulfide systems are often used at high temperatures, when vaporization of the components is enabled. Sulfide ores are used as sources of various metals and nonmetals and gaseous sulfides, and sulfosalts may also play a role in the atmosphere chemistry of hot rocky exoplanets. To predict the existence and thermal stability of gaseous sulfides and sulfosalts it is important to know their thermodynamic characteristics. In this study the sulfosalt of indium and arsenic was obtained in the gaseous phase for the first time. Methods High‐temperature Knudsen effusion mass spectrometry was used to determine the partial pressures of vapor species over indium and arsenic sulfides. A molybdenum double two‐temperature cell was used to create the conditions of coexistence of indium and arsenic sulfides. A theoretical study of gaseous As4S4 and In2AsS2 was performed using both B3LYP, M06, PBE0 and TPSSh hybrid DFT functionals and an ab initio wave function‐based MP2(Full) method. Results Gaseous In2AsS2 has been identified during vaporization of In6S7 and As2S3 from the molybdenum double two‐temperature cell. The structure and molecular parameters of gaseous In2AsS2 were determined using quantum chemical calculations. Energetically favorable structures of gaseous In2S, AsS, As4S4 and In2AsS2 were found and vibrational frequencies were evaluated in the harmonic approximation. The formation enthalpy of gaseous In2AsS2 (186 ± 37 kJ mol−1) was derived as a result of measurements of the equilibrium constants of two independent gas‐phase reactions. Conclusions The gaseous sulfosalt of indium and arsenic was obtained for the first time. The formation enthalpy of the In2AsS2 (g) molecule at 298 K was evaluated both experimentally and theoretically. The thermal stability of the gaseous sulfosalt is less than that of the gaseous oxyacid salts.

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Section: Methodsmentioning

confidence: 99%

“…The KEMS experiments were carried out using the Knudsen effusion technique combined with the mass spectrometric analysis of vapor composition described in detail elsewhere 20,21 For the gaseous synthesis of the sulfosalt, a double twotemperature cell was employed. 8,[21][22][23] This cell consists of two sections linked by a tube (Figure 2), with the upper part heated by a resistance furnace and the lower part by heat transfer.…”

Section: Knudsen Effusion Mass Spectrometry (Kems)mentioning

confidence: 99%

Thermochemical study of gaseous indium–arsenic sulfosalt

Шугуров

Panin

Лопатин

et al. 2019

Rapid Comm Mass Spectrometry

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“…Ionization of vapor species was achieved by electron ionization, with the energy of the ionizing electrons being 30 eV. The design and main parameters of the instrument have been reported . The molybdenum or tungsten effusion cell was heated by electron bombardment.…”

Section: Methodsmentioning

confidence: 99%

“…The design and main parameters of the instrument have been reported. [15] The molybdenum or tungsten effusion cell was heated by electron bombardment. The ratio of the effective area of the effusion orifice to the sample surface was less than 1:500.…”

Section: Experimental Knudsen Effusion Mass Spectrometrymentioning

confidence: 99%

Thermodynamics of gaseous barium cerate studied by Knudsen effusion mass spectrometry

Лопатин

Шугуров

Panin

2016

Rapid Comm Mass Spectrometry

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The stability of BaCeO3 gaseous species was confirmed by high-temperature mass spectrometry. Gas-phase reactions involving gaseous barium and cerium oxides with gaseous barium cerate were studied. The enthalpies of the formation reactions of gaseous barium cerate from gaseous BaO and CeO2 were evaluated theoretically and the obtained values were in agreement with the experimental ones. Copyright © 2016 John Wiley & Sons, Ltd.

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“…Ionization of vapor species was carried out by electron ionization, with the energy of ionizing electrons being 30 eV. A detailed description of the design and main parameters of the instrument has been published . A single molybdenum effusion cell was used in this study as a source of the molecular beam.…”

Section: Methodsmentioning

confidence: 99%