An Study on the Structure of Maghemite(<TEX>${gamma}$</TEX>-Fe<TEX>$_2$</TEX>O<TEX>$_3$</TEX>) I -Rietveld Analysis of Powder XRD Patterns-

,; ,

J. Korean Ceram. Soc. > Volume 35(10); 1998 > Article

Journal of the Korean Ceramic Society 1998;35(10): 1113.

마게마이트(${gamma}$-Fe$_2$O$_3$)대한 연구 I -분말 X-선 회절무늬의 Rietveld 분석-

신형섭

가야대학교 공학부

An Study on the Structure of Maghemite(${gamma}$-Fe$_2$O$_3$) I -Rietveld Analysis of Powder XRD Patterns-

ABSTRACT

Crystal structure of needle-shaped maghemite(${gamma}$-{{{{ { {Fe }_{2 }O }_{3 } }}) has been studied by the Rieveld analysis of powder X-ray diffraction patterns. The tetragonal space group P41,.3212 and cubic space group P41,.32 have been have been used for the refinement of X-ray diffraction patterns. The crystal system of maghemite is closed to tetragonal more than cubic. The tetragonal lattice parameters are a=8.3460$AA$ and c=25.034$AA$ The standard X-ray diffraction pattern of the tetragonal maghemite analyzed with space group P41,.3212 is proposed.

Key words: Maghemite, Powder X-ray diffraction, Rietveld analysis, Crystal structure