Record number :
2094856
Title of article :
Crystal structure of La(Mg2/3Nb1/3)O3 ceramics
Author/Authors :
Choi، نويسنده , , Ick-Kyu and Cho، نويسنده , , Bum Joon and Paik، نويسنده , , Jong-Hoo and Nahm، نويسنده , , Sahn and Kim، نويسنده , , Jung-Seok and Lee، نويسنده , , Hwack-Joo and Park، نويسنده , , Hyun-Min and Byun، نويسنده , , Jae Dong and Ahn، نويسنده , , Byung-Guk، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2000
Pages :
8
From page :
921
To page :
928
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 R3̄ or orthorhombic Pbnmstructure. The lattice parameters of La(Mg2/3Nb1/3)O3 are a = 5.6052, b = 5.6482, c = 7.9414 Å, 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.
Keywords :
D. Crystal structure , A. Ceramics , C. Electron diffraction , C. X-ray diffraction , C. Neutron scattering
Journal title :
Materials Research Bulletin
Journal title :
Materials Research Bulletin
Serial Year :
2000
Link To Document :
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