Journal of the Mineralogical Society of Korea (한국광물학회지)

The Mineralogical Society of Korea (한국광물학회)
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On the Structure and the Extent of Disorder in Non-crystalline Silicates at High Pressure: 2 Dimensional Solid-state NMR Study

2차원 고상 핵자기 공명기를 이용한 비정질 규산염의 고압구조 및 무질서도에 대하여

  • Lee Sung Keun (School of Earth and Environmental Sciences, Seoul National University)
  • 이성근 (서울대학교 지구환경과학부)
  • Published : 2005.03.01
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Abstract

The recent development and advances in 2 dimensional solid-state NMR, particularly, triple quantum (3Q) MAS NMR yield much improved resolution compared with conventional 1 dimensional MAS NMR, allowing us to study the distributions of cations and anions in the non-crystalline silicate glasses and melts. Here, we present the recent progress made by 3QMAS NMR spectra of silicate glasses quenched from melts at pressures up to 10 GPa in a multi-anvil apparatus, revealing previously unknown details of structures of covalent oxide glasses and melts at high pressure.

2차원 고상 핵자기 공명기(2-dimensional solid-state NMR, 이하 2차원 고상NMR)와 관련된 기술과 이론의 발전과 더불어 획기적으로 증가한 스펙트럼의 분해능으로 기존의 일차원 NMR 로는 얻을 수 없었던, 비정질 규산염(유리질, 용융체, silicate glasses and melts)의 다양한 원자-분자 단위의 구조를 규명할 수 있다. 본 논문에서는 이러한 2차원 고상 NMR 방법론의 하나인 3QMAS NMR을 이용하여 이전까지 알려지지 않았던 고압환경에서의 비정질 지구물질의 원자/분자 구조에 대한 최근의 연구결과를 간략히 소개한다.

Keywords

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