- La(Mg$_{2/3}$Nb$_{1/3}$)O$_3$ 세라믹의 결정구조
- ㆍ 저자명
- 심동민,송용원,조범준,백종후,남산,김경용,변재동
- ㆍ 간행물명
- 요업학회지
- ㆍ 권/호정보
- 1999년|36권 8호|pp.848-852 (5 pages)
- ㆍ 발행정보
- 한국세라믹학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
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Crystal structure of La(Mg2/3Nb1/3)O3 has been analyzed by high resolution transmission electron microcopy (HRTEM) and Rietveld refinement using X-ray powder diffraction pattern. La(Mg2/3Nb1/3)O3 has 1:1 ordered monoclinic structure P21/n contrarily to the results of previous works which suggested 1:1 romobohedral or orthorombic structure. The lattice parameters of La(Mg2/3Nb1/3)O3 are a=5.6004 $AA$, b=5.6414 $AA$ c=7.9346 $AA$ and $eta$=89.9819$^{circ}$Monoclinic La(Mg2/3Nb1/3)O3 is distorted by in-phase and anti-phase tilting of octahedra with the a-,a-,c+ tiliting system. Anti-parallel shift of A-site cations was also found in La(Mg2/3Nb1/3)O3