Journal of the Mineralogical Society of Korea (한국광물학회지)

The Mineralogical Society of Korea (한국광물학회)
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Electron Energy Loss Spectroscopy (EELS) Application to Mineral Formation

전자에너지 손실분광 분석법을 이용한 광물에서의 정량적 철 산화수 측정과 분석

  • Yang, Kiho (Department of Earth System Sciences, Yonsei University) ;
  • Kim, Jinwook (Department of Earth System Sciences, Yonsei University)
  • 양기호 (연세대학교 지구시스템과학과) ;
  • 김진욱 (연세대학교 지구시스템과학과)
  • Received : 2016.06.07
  • Accepted : 2016.06.18
  • Published : 2016.06.30
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Abstract

The oxidation states of structural Fe in clay minerals often reflect the paleo-redox conditions of the depositional environments. It is inevitable to utilize the high resolution of transmission electron microscopy (TEM) to investigate the mechanism of mineral transformation at nano-scale. The applications of TEM- electron energy loss spectroscopy (EELS) for quantification of $Fe(III)/{\Sigma}Fe$ from the K-nontronite formation associated with structural Fe(III) reduction in nontronite under deep subseafloor environment were demonstrated. In particular, quantification of the changes in Fe-oxidation state at nanoscale is essential to understand the mechanisms of minerals formation. The procedure of EELS acquisition, quantitative determination of Fe-oxidation states, and advantages of EELS techniques were discussed.

점토 광물의 구조 내에 들어 있는 철의 산화수는 퇴적환경의 산화/환원 조건에 대한 정보를 제공하여 준다. 이러한 광물형성의 메커니즘을 밝히기 위해서는 고해상도를 가진 전자현미경을 이용한 나노 스케일 분석이 불가피하다. 투과전자현미경에 장착되어있는 전자에너지 손실분광 분석법(EELS)을 이용하여 정량적 철 산화수 분석을 논트로나이트 점토광물 구조 내 철의 환원으로 인한 K-논트로나이트의 형성의 예를 들어 설명하고자 한다. 철 산화/환원의 정량적 분석을 통하여 퇴적물의 위치에 따른 철 산화도 측정은 광물변화에 대한 연구를 용이하게 해준다. 따라서 본 논문은 전자에너지 손실분광의 분석방법 및 장점을 소개함을 목적으로 한다.

Keywords

References

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