電子顕微鏡による層状珪酸塩のナノ解析法(<特集>粘土圏の空間分布とナノ解析手法の新展開)

概要

論文の詳細を見る
High-Resolution Transmission Electron Microscopy (HRTEM) is a unique and important technique to provide information on local atomic structures by direct visualization of atom columns parallel to the electron beam in clay minerals and related materials. Atom columns corresponding to each tetrahedron, octahedron and interlayer cation in phyllosilicates can be resolved if observed along the principal zone-axes parallel to the basal plane, by using an electron microscope with a point resolution of close to 0.2 nm and appropriate sample preparation. Image processing to remove noisy contrast from amorphous materials on crystals is helpful to analyze local structures. It is shown that these near-atomic resolution images are applied to determine the stacking sequences (lateral displacement and rotation between adjacent layers) or polytypes in 1 : 1 phyllosilicates, chlorite and micas. Combination of two HRTEM images at the same area but along different recording directions enables three-dimensional determination of the stacking in phyllosilicates.
日本粘土学会の論文
2004-03-12