EXPANSION CHARACTERISTICS OF MONTMORILLONITE AND SAPONITE UNDER VARIOUS RELATIVE HUMIDITY CONDITIONS
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概要
- 論文の詳細を見る
The basal spacings of the homoionic (Na^+, K^+ and Ca^<2+>) montmorillonite (T1) and saponite (SapCa-1) were examined by X-ray powder diffraction (XRD) analysis under the atmospheres of relative humidity (RH). RH was controlled by ReCX (Relative humidity Control system for X-ray diffractometer) precisely in the range of 0 to 100% RH. The variations of basal spacing were almost similar in both minerals at the range of 0 to 80% RH. However, noticeable differences between the hydration state of T1 and SapCa-1 were observed at 100% RH. It was explained that the differences were caused by charge localization and hydroxyl orientation in silicate layer because of these specimens having similar layer charge. In the region between 2 hydration states, irrational and asymmetrical reflections were observed. These reflections indicated interstratified structure of 2 hydration states. Especially at 60% RH, that the segregation structure was recognized. The existence of 2 phases indicates that there is heterogeneity in its charge density of layer.
- 日本粘土学会の論文
著者
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Watanabe Takashi
Department of Chemistry, Graduate School of Science, Kyoto University
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SATO Tsutomu
Microelectronics Engineering Laboratory, Toshiba Corporation
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Sato Tsutomu
Department Of Applied Biological Chemistry Faculty Of Agriculture And Graduate School Of Science And
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Sato Tsutomu
Microelectronics Engineering Laboratory Toshiba Corporation
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Sato Tsutomu
Department Of Agricultural Chemistry Faculty Of Agriculture Yamaguchi University
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Watanabe Takashi
Department Of Applied Physics Tohoku University
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Sato Tsutomu
Departmenet of Physics,Faculty of Sience,Hirosaki University
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