Journal of the Mineralogical Society of Korea (한국광물학회지)
- Volume 9 Issue 1
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- Pages.43-53
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- 1996
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- 1225-309X(pISSN)
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- 2288-7172(eISSN)
Crystal Chemistry of Ilmenite from the Hadong anorthosite Massif
하동 회장암체 내에서 산출하는 티탄철석의 결정화학
Abstract
The detailed crystal chemistry of ilmenite from the Hadong massif was studied by the EPMA, M ssbauer spectroscopy, and Rietveld structural refinement using X-ray powder diffraction data. The ilmenite-bearing anorthosite shows complicated mineral assemblage which consists of plagioclase, clinopyroxene, hornblende, biotite, chlorite, apatite, allanite, and zircon. Anorthite is andesine in composition (Ab 28-57), and clinopyroxene drops in ferro-hypersthene (Fs 62-70). Ilmenite is trigonal symmetry with R space group, whose structure shows the alternation of Fe2+ (M1 site) octahedral layer and Ti (M2 site) layer along c axis. M ssbauer spectroscopy indicates that there are three doubles which assigned to couple of Fe2+(
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