ゼオライトの電顕観察前処理としての加熱処理 : 積層不整の解析と組成分析への応用の試み

概要

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Zeolite is, in general, very weak for electron irradiation. High temperature treatment of zeolite specimens in vacuo has been applied for high resolution electron microscopy and compositional analysis of naturally occuring zeolites. Zeolites heated in vauco became resistible under electron beam irradiation although the degrees of stability depend on the kinds of zeolite species. By applying this treatment, HREM image of (010) stacking faults (microtwining) in dachiardite was taken for the first time. This resolved vague image of 1/2 c displacements. The vagueness was explained by a superimposition of many (100) slab images derived from frequent (100) stacking faults. Varieties of ED patterns of dachiardite could be explained based on a model of reciplocal lattice diffusing in disk form embedded parallel to b - c plane on the 1= 2n+1 levels. Stacking faults in mordenite were also explained by the similar structural relationships. Basic examinations for compositional analysis by AEM were also carried out and key points for the analysis were discussed.
1989-12-27