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High Temperature Neutron Powder diffraction study of the Oxide Ion Conductor La0.9Ga0.1Mg0.2O2.85

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High Temperature Neutron Powder diffraction study of the Oxide Ion Conductor La0.9Ga0.1Mg0.2O2.85. / Irvine, John Thomas Sirr; Slater, PR; Ishihara, T; Yakita, Y.

In: Journal of Solid State Chemistry, Vol. 139, 08.1998, p. 135-143.

Research output: Contribution to journalArticle

Harvard

Irvine, JTS, Slater, PR, Ishihara, T & Yakita, Y 1998, 'High Temperature Neutron Powder diffraction study of the Oxide Ion Conductor La0.9Ga0.1Mg0.2O2.85', Journal of Solid State Chemistry, vol. 139, pp. 135-143.

APA

Irvine, J. T. S., Slater, PR., Ishihara, T., & Yakita, Y. (1998). High Temperature Neutron Powder diffraction study of the Oxide Ion Conductor La0.9Ga0.1Mg0.2O2.85. Journal of Solid State Chemistry, 139, 135-143.

Vancouver

Irvine JTS, Slater PR, Ishihara T, Yakita Y. High Temperature Neutron Powder diffraction study of the Oxide Ion Conductor La0.9Ga0.1Mg0.2O2.85. Journal of Solid State Chemistry. 1998 Aug;139:135-143.

Author

Irvine, John Thomas Sirr ; Slater, PR ; Ishihara, T ; Yakita, Y. / High Temperature Neutron Powder diffraction study of the Oxide Ion Conductor La0.9Ga0.1Mg0.2O2.85. In: Journal of Solid State Chemistry. 1998 ; Vol. 139. pp. 135-143.

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@article{03d3429bcee84577a23256b939dcf53c,
title = "High Temperature Neutron Powder diffraction study of the Oxide Ion Conductor La0.9Ga0.1Mg0.2O2.85",
abstract = "Powder neutron diffraction data have been collected between room temperature and 1000 degrees C for the oxide ion conductor La0.9Sr0.1Ga0.8Mg0.2O2.85 and the undoped parent phase LaGaO3. In agreement with previous studies, refinement of the data for the undoped phase showed that the cell is orthorhombic (Pbnm) at room temperature and rhombohedral (R3c) between 250 and 1000 degrees C, The structure of the doped system La0.9Sr0.1Ga0.8 Mg0.2O2.85 is, however, significantly different from that of pure LaGaO3, The room temperature structure is monoclinic (I2/a), and there appear to be two phase transitions between 250 and 1000 degrees C: monoclinic (pseudo-orthorhombic) --> monoclinic (pseudo-rhombohedral) --> rhombohedral, Significant changes are also seen in the GaO6 octahedra on doping LaGaO3. In particular, the octahedra are substantially more distorted in the doped phase, The tilting of the octahedra is smaller for the doped phase and the degree of tilting is reduced as the temperature is raised. Possible correlation between the tilting of the octahedra and the activation energy for oxide ion conduction is presented, (C) 1998 Academic Press.",
keywords = "PEROVSKITE-TYPE OXIDE, LANTHANUM GALLATE, FUEL-CELLS, ELECTROLYTE, LAGAO3, LA",
author = "Irvine, {John Thomas Sirr} and PR Slater and T Ishihara and Y Yakita",
year = "1998",
month = "8",
language = "English",
volume = "139",
pages = "135--143",
journal = "Journal of Solid State Chemistry",
issn = "0022-4596",
publisher = "Academic Press Inc.",

}

RIS (suitable for import to EndNote) - Download

TY - JOUR

T1 - High Temperature Neutron Powder diffraction study of the Oxide Ion Conductor La0.9Ga0.1Mg0.2O2.85

AU - Irvine, John Thomas Sirr

AU - Slater, PR

AU - Ishihara, T

AU - Yakita, Y

PY - 1998/8

Y1 - 1998/8

N2 - Powder neutron diffraction data have been collected between room temperature and 1000 degrees C for the oxide ion conductor La0.9Sr0.1Ga0.8Mg0.2O2.85 and the undoped parent phase LaGaO3. In agreement with previous studies, refinement of the data for the undoped phase showed that the cell is orthorhombic (Pbnm) at room temperature and rhombohedral (R3c) between 250 and 1000 degrees C, The structure of the doped system La0.9Sr0.1Ga0.8 Mg0.2O2.85 is, however, significantly different from that of pure LaGaO3, The room temperature structure is monoclinic (I2/a), and there appear to be two phase transitions between 250 and 1000 degrees C: monoclinic (pseudo-orthorhombic) --> monoclinic (pseudo-rhombohedral) --> rhombohedral, Significant changes are also seen in the GaO6 octahedra on doping LaGaO3. In particular, the octahedra are substantially more distorted in the doped phase, The tilting of the octahedra is smaller for the doped phase and the degree of tilting is reduced as the temperature is raised. Possible correlation between the tilting of the octahedra and the activation energy for oxide ion conduction is presented, (C) 1998 Academic Press.

AB - Powder neutron diffraction data have been collected between room temperature and 1000 degrees C for the oxide ion conductor La0.9Sr0.1Ga0.8Mg0.2O2.85 and the undoped parent phase LaGaO3. In agreement with previous studies, refinement of the data for the undoped phase showed that the cell is orthorhombic (Pbnm) at room temperature and rhombohedral (R3c) between 250 and 1000 degrees C, The structure of the doped system La0.9Sr0.1Ga0.8 Mg0.2O2.85 is, however, significantly different from that of pure LaGaO3, The room temperature structure is monoclinic (I2/a), and there appear to be two phase transitions between 250 and 1000 degrees C: monoclinic (pseudo-orthorhombic) --> monoclinic (pseudo-rhombohedral) --> rhombohedral, Significant changes are also seen in the GaO6 octahedra on doping LaGaO3. In particular, the octahedra are substantially more distorted in the doped phase, The tilting of the octahedra is smaller for the doped phase and the degree of tilting is reduced as the temperature is raised. Possible correlation between the tilting of the octahedra and the activation energy for oxide ion conduction is presented, (C) 1998 Academic Press.

KW - PEROVSKITE-TYPE OXIDE

KW - LANTHANUM GALLATE

KW - FUEL-CELLS

KW - ELECTROLYTE

KW - LAGAO3

KW - LA

UR - http://www.scopus.com/inward/record.url?scp=0000395625&partnerID=8YFLogxK

M3 - Article

VL - 139

SP - 135

EP - 143

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

SN - 0022-4596

ER -

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