Crystal structure of La(Mg2/3Nb1/3)O3 ceramics

Ick Kyu Choi; Bum Joon Cho; Jong Hoo Paik; Sahn Nahm; Jung Seok Kim; Hwack Joo Lee; Hyun Min Park; Jae Dong Byun; Byung Guk Ahn

doi:10.1016/S0025-5408(00)00275-0

Crystal structure of La(Mg_2/3Nb_1/3)O₃ ceramics

Ick Kyu Choi, Bum Joon Cho, Jong Hoo Paik, Sahn Nahm, Jung Seok Kim, Hwack Joo Lee, Hyun Min Park, Jae Dong Byun, Byung Guk Ahn

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

The crystal structure of La(Mg_2/3Nb_1/3)O₃ has been analyzed by high-resolution transmission electron microscopy (HRTEM) and Rietveld refinement using X-ray and neutron powder diffraction patterns. According to our analysis, La(Mg_2/3Nb_1/3)O₃ has the 1:1 ordered monoclinic P2₁/n structure, contrary to the results of previous works which suggest a 1:1 ordered rhombohedral R3̄ or orthorhombic Pbnm structure. The lattice parameters of La(Mg_2/3Nb_1/3)O₃ are a = 5.6052, b = 5.6482, c = 7.9414 angstroms, and β = 89.9501°. Monoclinic La(Mg_2/3Nb_1/3)O₃ is distorted by the inphase and the antiphase tilting of octahedra with the a^-a^-c⁺ tilting system. The antiparallel shift of A-site cations was also found in La(Mg_2/3Nb_1/3)O₃.

Original language	English
Pages (from-to)	921-928
Number of pages	8
Journal	Materials Research Bulletin
Volume	35
Issue number	6
DOIs	https://doi.org/10.1016/S0025-5408(00)00275-0
Publication status	Published - 2000 Apr 1

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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@article{5aa1299f0662451eabd57821aa36216c,

title = "Crystal structure of La(Mg2/3Nb1/3)O3 ceramics",

abstract = "The crystal structure of La(Mg2/3Nb1/3)O3 has been analyzed by high-resolution transmission electron microscopy (HRTEM) and Rietveld refinement using X-ray and neutron powder diffraction patterns. According to our analysis, La(Mg2/3Nb1/3)O3 has the 1:1 ordered monoclinic P21/n structure, contrary to the results of previous works which suggest a 1:1 ordered rhombohedral R{\=3} or orthorhombic Pbnm structure. The lattice parameters of La(Mg2/3Nb1/3)O3 are a = 5.6052, b = 5.6482, c = 7.9414 angstroms, and β = 89.9501°. Monoclinic La(Mg2/3Nb1/3)O3 is distorted by the inphase and the antiphase tilting of octahedra with the a-a-c+ tilting system. The antiparallel shift of A-site cations was also found in La(Mg2/3Nb1/3)O3.",

author = "Choi, {Ick Kyu} and Cho, {Bum Joon} and Paik, {Jong Hoo} and Sahn Nahm and Kim, {Jung Seok} and Lee, {Hwack Joo} and Park, {Hyun Min} and Byun, {Jae Dong} and Ahn, {Byung Guk}",

year = "2000",

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doi = "10.1016/S0025-5408(00)00275-0",

language = "English",

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T1 - Crystal structure of La(Mg2/3Nb1/3)O3 ceramics

AU - Choi, Ick Kyu

AU - Cho, Bum Joon

AU - Paik, Jong Hoo

AU - Nahm, Sahn

AU - Kim, Jung Seok

AU - Lee, Hwack Joo

AU - Park, Hyun Min

AU - Byun, Jae Dong

AU - Ahn, Byung Guk

PY - 2000/4/1

Y1 - 2000/4/1

N2 - The crystal structure of La(Mg2/3Nb1/3)O3 has been analyzed by high-resolution transmission electron microscopy (HRTEM) and Rietveld refinement using X-ray and neutron powder diffraction patterns. According to our analysis, La(Mg2/3Nb1/3)O3 has the 1:1 ordered monoclinic P21/n structure, contrary to the results of previous works which suggest a 1:1 ordered rhombohedral R3̄ or orthorhombic Pbnm structure. The lattice parameters of La(Mg2/3Nb1/3)O3 are a = 5.6052, b = 5.6482, c = 7.9414 angstroms, and β = 89.9501°. Monoclinic La(Mg2/3Nb1/3)O3 is distorted by the inphase and the antiphase tilting of octahedra with the a-a-c+ tilting system. The antiparallel shift of A-site cations was also found in La(Mg2/3Nb1/3)O3.

AB - The crystal structure of La(Mg2/3Nb1/3)O3 has been analyzed by high-resolution transmission electron microscopy (HRTEM) and Rietveld refinement using X-ray and neutron powder diffraction patterns. According to our analysis, La(Mg2/3Nb1/3)O3 has the 1:1 ordered monoclinic P21/n structure, contrary to the results of previous works which suggest a 1:1 ordered rhombohedral R3̄ or orthorhombic Pbnm structure. The lattice parameters of La(Mg2/3Nb1/3)O3 are a = 5.6052, b = 5.6482, c = 7.9414 angstroms, and β = 89.9501°. Monoclinic La(Mg2/3Nb1/3)O3 is distorted by the inphase and the antiphase tilting of octahedra with the a-a-c+ tilting system. The antiparallel shift of A-site cations was also found in La(Mg2/3Nb1/3)O3.

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Crystal structure of La(Mg_2/3Nb_1/3)O₃ ceramics

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