한국광물학회지 (Journal of the Mineralogical Society of Korea)

  • 제24권3호
  • /
  • Pages.195-204
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  • 2011
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  • 1225-309X(pISSN)
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  • 2288-7172(eISSN)
한국광물학회 (The Mineralogical Society of Korea)
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티탄철석-적철석 용출시료의 구조분석과 상태방정식 연구

Structure Refinement and Equation of State Studies of the Exsoluted Ilmenite-Hematite

  • 황길찬 (경상대학교 지구환경과학과) ;
  • 김영호 (경상대학교 지구환경과학과)
  • Hwang, Gil-Chan (Department of Earth and Environmental Sciences and Research Institute of Natural Sciences, Gyeongsang National University) ;
  • Kim, Young-Ho (Department of Earth and Environmental Sciences and Research Institute of Natural Sciences, Gyeongsang National University)
  • 투고 : 2011.08.24
  • 심사 : 2011.09.22
  • 발행 : 2011.09.30
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초록

용출구조를 보이는 티탄철석-적철석 광석시료에 대한 구조분석을 리트벨트법을 이용하여 시행하였다. 구조유사체인 두 광물의 분석결과, 기본구조인 팔면체의 형태는 티탄철석의 Ti를 중심으로 한 팔면체(M2)가 정팔면체에 가장 가까운 형태를 보여주며, 다음은 티탄철석의 Fe를 중심으로 한 팔면체(M1)이다. 적철석 팔면체의 경우 M1과 M2 중간정도이다. 고압실험은 두 광물의 회절선이 중첩되는 5.8 GPa까지 시행하였다. 이 압력구간에서 티탄철석은 정상적인 압축성을 보이나, 적철석의 압축은 미미하게 발생하는 비정상적인 거동을 보인다. 이러한 이상거동은 두 광물의 압축성 차이에 의한 차등대응에 의한 것으로 판단된다.

Exsolution intergrowth of ilmenite and hematite was studied by the Rietveld refinement method. According to the analysis on these two structural analog minerals, it was found that octahedron (M2) of Ti in ilmenite is in the least deformation, then that (M1) of Fe in ilmenite is deformed next, and octaheron deformation of Fe in hematite is between M1 and M2. High pressure compression experiment was performed up to 5.8 GPa, where two minerals' XRD peaks merged completely. Ilmenite shows normal compression behavior, whereas hematite shrinks in very small amount. This kind of abnormal behavior might be due to the differential response to the applied pressure corresponding to the different compressibilities of the minerals each other.

키워드

과제정보

연구 과제 주관 기관 : 한국연구재단

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피인용 문헌

  1. Magnetic Stability of Hematite on Low-temperature Magnetic Phase Transition vol.26, pp.1, 2013, https://doi.org/10.9727/jmsk.2013.26.1.19