http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
네오비움 페롭스카이트 ( Ca2NbFe3+O6 ) 의 화학조성 및 리트벨트 구조분석 연구
최진범(Jin Beom Choi),(Frank C. Hawthorne) 한국광물학회 2002 광물과 암석 (J.Miner.Soc.Korea) Vol.15 No.1
Chemical analyses and Rietveld structural refinement with powder X-ray diffraction data were done for Nb-rich perovskite, named latrappite (Ca_2NbFe^3+O_6) from the Oka, Quebec, Canada. Latrappite is shown to be a member of a continuous solid solution of CaTiO_3-NaNbO_3-Ca_2NbFe^3+O_6, and approximately ((Ca_1.5Na_0.4) (Nb_1.0Ti_0.6Fe_0.4)O_6 in composition. The crystal structure of latrappite, determined by Rietveld refinement, is similar to that of perovskite (CaTiO_3). It differs in that replacement of Ti by Nb and Fe^3+ results in greeter distortion and tilting of the TiO_6 framework octahedra relative to CaTiO_3 Revised unit-cell parameters of latrappite are a=5.4474(4), b=5.5264(4), c=7.7519(5) A°, V=233.4(3) A°^3, space group Pbnm.