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Naoki Kamegashira - One of the best experts on this subject based on the ideXlab platform.
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studies on oxygen Dissociation Pressure of lnmno3 ln rare earth with the e m f technique
Journal of Alloys and Compounds, 1996Co-Authors: Taroh Atsumi, Tatsuo Ohgushi, Naoki KamegashiraAbstract:Abstract The oxygen Dissociation Pressure of LnMnO 3 (Ln La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y or Sc) was measured at high temperature (1170–1400 K) by means of e.m.f. using stabilized ZrO 2 as a solid electrolyte. Assuming that the decomposition reaction proceeds in a stoichiometric form, a standard Gibbs free energy change of decomposition was determined from the oxygen Dissociation Pressure. The variation of the free energy change with change in identity of Ln was investigated. It was found that the energy change depends strongly upon both the crystal structure and the ionic radius of Ln 3+ . The standard Gibbs free energy change of formation for LnMnO 3 compounds was obtained from the standard Gibbs free energy change for the decomposition reactions and those for the formation of the decomposition materials.
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studies on oxygen Dissociation Pressure of lnmno3 ln rare earth with the e m f technique
Journal of Alloys and Compounds, 1996Co-Authors: Taroh Atsumi, Tatsuo Ohgushi, Naoki KamegashiraAbstract:Abstract The oxygen Dissociation Pressure of LnMnO 3 (Ln La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y or Sc) was measured at high temperature (1170–1400 K) by means of e.m.f. using stabilized ZrO 2 as a solid electrolyte. Assuming that the decomposition reaction proceeds in a stoichiometric form, a standard Gibbs free energy change of decomposition was determined from the oxygen Dissociation Pressure. The variation of the free energy change with change in identity of Ln was investigated. It was found that the energy change depends strongly upon both the crystal structure and the ionic radius of Ln 3+ . The standard Gibbs free energy change of formation for LnMnO 3 compounds was obtained from the standard Gibbs free energy change for the decomposition reactions and those for the formation of the decomposition materials.
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Studies on oxygen Dissociation Pressure of LnMnO3 (Ln = rare earth) with the e.m.f. technique
Journal of Alloys and Compounds, 1996Co-Authors: Taroh Atsumi, Tatsuo Ohgushi, Naoki KamegashiraAbstract:Abstract The oxygen Dissociation Pressure of LnMnO 3 (Ln La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y or Sc) was measured at high temperature (1170–1400 K) by means of e.m.f. using stabilized ZrO 2 as a solid electrolyte. Assuming that the decomposition reaction proceeds in a stoichiometric form, a standard Gibbs free energy change of decomposition was determined from the oxygen Dissociation Pressure. The variation of the free energy change with change in identity of Ln was investigated. It was found that the energy change depends strongly upon both the crystal structure and the ionic radius of Ln 3+ . The standard Gibbs free energy change of formation for LnMnO 3 compounds was obtained from the standard Gibbs free energy change for the decomposition reactions and those for the formation of the decomposition materials.
Taroh Atsumi - One of the best experts on this subject based on the ideXlab platform.
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studies on oxygen Dissociation Pressure of lnmno3 ln rare earth with the e m f technique
Journal of Alloys and Compounds, 1996Co-Authors: Taroh Atsumi, Tatsuo Ohgushi, Naoki KamegashiraAbstract:Abstract The oxygen Dissociation Pressure of LnMnO 3 (Ln La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y or Sc) was measured at high temperature (1170–1400 K) by means of e.m.f. using stabilized ZrO 2 as a solid electrolyte. Assuming that the decomposition reaction proceeds in a stoichiometric form, a standard Gibbs free energy change of decomposition was determined from the oxygen Dissociation Pressure. The variation of the free energy change with change in identity of Ln was investigated. It was found that the energy change depends strongly upon both the crystal structure and the ionic radius of Ln 3+ . The standard Gibbs free energy change of formation for LnMnO 3 compounds was obtained from the standard Gibbs free energy change for the decomposition reactions and those for the formation of the decomposition materials.
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studies on oxygen Dissociation Pressure of lnmno3 ln rare earth with the e m f technique
Journal of Alloys and Compounds, 1996Co-Authors: Taroh Atsumi, Tatsuo Ohgushi, Naoki KamegashiraAbstract:Abstract The oxygen Dissociation Pressure of LnMnO 3 (Ln La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y or Sc) was measured at high temperature (1170–1400 K) by means of e.m.f. using stabilized ZrO 2 as a solid electrolyte. Assuming that the decomposition reaction proceeds in a stoichiometric form, a standard Gibbs free energy change of decomposition was determined from the oxygen Dissociation Pressure. The variation of the free energy change with change in identity of Ln was investigated. It was found that the energy change depends strongly upon both the crystal structure and the ionic radius of Ln 3+ . The standard Gibbs free energy change of formation for LnMnO 3 compounds was obtained from the standard Gibbs free energy change for the decomposition reactions and those for the formation of the decomposition materials.
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Studies on oxygen Dissociation Pressure of LnMnO3 (Ln = rare earth) with the e.m.f. technique
Journal of Alloys and Compounds, 1996Co-Authors: Taroh Atsumi, Tatsuo Ohgushi, Naoki KamegashiraAbstract:Abstract The oxygen Dissociation Pressure of LnMnO 3 (Ln La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y or Sc) was measured at high temperature (1170–1400 K) by means of e.m.f. using stabilized ZrO 2 as a solid electrolyte. Assuming that the decomposition reaction proceeds in a stoichiometric form, a standard Gibbs free energy change of decomposition was determined from the oxygen Dissociation Pressure. The variation of the free energy change with change in identity of Ln was investigated. It was found that the energy change depends strongly upon both the crystal structure and the ionic radius of Ln 3+ . The standard Gibbs free energy change of formation for LnMnO 3 compounds was obtained from the standard Gibbs free energy change for the decomposition reactions and those for the formation of the decomposition materials.
Aleksei A. Titov - One of the best experts on this subject based on the ideXlab platform.
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Thermodynamic characteristics of thermal Dissociation of platinum dichloride
Russian Chemical Bulletin, 2005Co-Authors: Z. I. Semenova, Tamara P. Chusova, Aleksei A. TitovAbstract:The Dissociation Pressure for the process PtCl_2(s) → Pt(s) + Cl_2(g) was measured by the static method with diaphragm zero-Pressure gauges. The approximating equation for the temperature dependence on the Dissociation Pressure for the above reaction was found. The enthalpy (137.7±0.3 kJ mol^−1) and entropy (163.6±0.4 J mol^−1 K^−1) of PtCl_2(s) Dissociation and enthalpies of formation and absolute entropies of platinum di- and trichlorides at 298.15 K were calculated.
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Thermodynamic characteristics of thermal Dissociation of platinum tetrachloride
Russian Chemical Bulletin, 2004Co-Authors: Z. I. Semenova, Tamara P. Chusova, Aleksei A. TitovAbstract:The Pressure of thermal Dissociation of platinum tetrachloride by the first step PtCl4(s) = PtCl3(s) + 0.5 Cl2(g) was measured by the static method with a quartz membrane-gauge zero-Pressure manometer. An approximating equation for the Dissociation Pressure vs. temperature was found. The enthalpy (52160±880 J mol−1) and entropy (72.1±1.6 J mol−1 K−1) of Dissociation were calculated. The heat of formation found for platinum tetrachloride (−246.3±1.3 kJ mol−1) at 298.15 K agrees well with the value obtained by the calorimetric method (−245.6±1.9 kJ mol−1).
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Thermodynamic characteristics of thermal Dissociation of platinum trichloride
Russian Chemical Bulletin, 2004Co-Authors: Z. I. Semenova, Tamara P. Chusova, Aleksei A. TitovAbstract:Single crystals of platinum trichloride were grown for the first time. The IR spectrum of single-crystal PtCl_3 was recorded. The Pressure of thermal Dissociation of PtCl_3 was measured by the static method with a quartz membrane-gauge zero-Pressure manometer. An approximating equation for the Dissociation Pressure vs. temperature (540 K ≤ T ≤ 775 K) for the reaction 2 PtCl_3(s) → 2 PtCl_2(s) + Cl_2(g) was found. The enthalpy (123.1±1.7 kJ mol^−1) and entropy (183.6±2.8 J mol^−1 K^−1) for the Dissociation of PtCl_3(s) were calculated at 298.15 K.
R J Needs - One of the best experts on this subject based on the ideXlab platform.
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Dissociation of high Pressure solid molecular hydrogen a quantum monte carlo and anharmonic vibrational study
Physical Review Letters, 2014Co-Authors: Sam Azadi, Bartomeu Monserrat, W M C Foulkes, R J NeedsAbstract:A theoretical study is reported of the molecular-to-atomic transition in solid hydrogen at high Pressure. We use the diffusion quantum Monte Carlo method to calculate the static lattice energies of the competing phases and a density-functional-theory-based vibrational self-consistent field method to calculate anharmonic vibrational properties. We find a small but significant contribution to the vibrational energy from anharmonicity. A transition from the molecular Cmca-12 direct to the atomic I41/amd phase is found at 374 GPa. The vibrational contribution lowers the transition Pressure by 91 GPa. The Dissociation Pressure is not very sensitive to the isotopic composition. Our results suggest that quantum melting occurs at finite temperature.
Tatsuo Ohgushi - One of the best experts on this subject based on the ideXlab platform.
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studies on oxygen Dissociation Pressure of lnmno3 ln rare earth with the e m f technique
Journal of Alloys and Compounds, 1996Co-Authors: Taroh Atsumi, Tatsuo Ohgushi, Naoki KamegashiraAbstract:Abstract The oxygen Dissociation Pressure of LnMnO 3 (Ln La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y or Sc) was measured at high temperature (1170–1400 K) by means of e.m.f. using stabilized ZrO 2 as a solid electrolyte. Assuming that the decomposition reaction proceeds in a stoichiometric form, a standard Gibbs free energy change of decomposition was determined from the oxygen Dissociation Pressure. The variation of the free energy change with change in identity of Ln was investigated. It was found that the energy change depends strongly upon both the crystal structure and the ionic radius of Ln 3+ . The standard Gibbs free energy change of formation for LnMnO 3 compounds was obtained from the standard Gibbs free energy change for the decomposition reactions and those for the formation of the decomposition materials.
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studies on oxygen Dissociation Pressure of lnmno3 ln rare earth with the e m f technique
Journal of Alloys and Compounds, 1996Co-Authors: Taroh Atsumi, Tatsuo Ohgushi, Naoki KamegashiraAbstract:Abstract The oxygen Dissociation Pressure of LnMnO 3 (Ln La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y or Sc) was measured at high temperature (1170–1400 K) by means of e.m.f. using stabilized ZrO 2 as a solid electrolyte. Assuming that the decomposition reaction proceeds in a stoichiometric form, a standard Gibbs free energy change of decomposition was determined from the oxygen Dissociation Pressure. The variation of the free energy change with change in identity of Ln was investigated. It was found that the energy change depends strongly upon both the crystal structure and the ionic radius of Ln 3+ . The standard Gibbs free energy change of formation for LnMnO 3 compounds was obtained from the standard Gibbs free energy change for the decomposition reactions and those for the formation of the decomposition materials.
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Studies on oxygen Dissociation Pressure of LnMnO3 (Ln = rare earth) with the e.m.f. technique
Journal of Alloys and Compounds, 1996Co-Authors: Taroh Atsumi, Tatsuo Ohgushi, Naoki KamegashiraAbstract:Abstract The oxygen Dissociation Pressure of LnMnO 3 (Ln La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Y or Sc) was measured at high temperature (1170–1400 K) by means of e.m.f. using stabilized ZrO 2 as a solid electrolyte. Assuming that the decomposition reaction proceeds in a stoichiometric form, a standard Gibbs free energy change of decomposition was determined from the oxygen Dissociation Pressure. The variation of the free energy change with change in identity of Ln was investigated. It was found that the energy change depends strongly upon both the crystal structure and the ionic radius of Ln 3+ . The standard Gibbs free energy change of formation for LnMnO 3 compounds was obtained from the standard Gibbs free energy change for the decomposition reactions and those for the formation of the decomposition materials.