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Preparation and dehydration behaviour of thomsonite with ideal chemical composition

  • Earth Sciences
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Abstract

Thomsonite with ideal chemical composition and with an ordered framework structure was synthesised hydrothermally from zeolite Na−A, which was ground to X-ray amorphous, with 0.05 mol dm−3 CaCl2 solution at 200°C. The dehydration behaviour of the prepared thomsonite was examined by TG-DTA. It was revealed that thomsonite lost most of zeolitic water below 450°C in three steps at about 180°, 340° and 390°C. The peak profiles of, the two higher-temperature endotherms were sharp and similar, and the weight loss at each step was approximately equal.

Zusammenfassung

Aus Zeolith Na−A, welches mittels einer 0,05 molaren CaCl2-Lösung bei 200°C röntgenographisch amorph gemahlen wurde, stellte man auf hydrothermischem Wege Thomsonit mit idealer chemischer Zusammensetzung und mit einer geordneten Gitterstruktur her. Das Dehydratationsverhalten des hergestellten Thomsonits wurde mittels TG/DTA untersucht. Es wurde gezeigt, daß Thomsonit unter 450°C, in drei Schritten: bei 180°, 340° und bei 390°C einen Großteil Zeolith-Wasser verliert. Die Peakverläufe der zwei Endothermen bei höheren Temperaturen sind scharf und ähneln sich und der Gewichtsverlust ist bei jedem Schritt etwa gleich.

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Authors and Affiliations

  1. Department of Mineral Resources Engineering, School of Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku-Ku, 169, Tokyo, Japan

    A. Yamazaki, Y. Inoue, M. Koike & R. Otsuka

  2. Faculty of Liberal Arts and Science, Okayma University of Science, 1-1 Ridai-cho, 700, Okayama City, Okayama Pref., Japan

    T. Sakamoto

Authors
  1. A. Yamazaki
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  2. Y. Inoue
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  3. M. Koike
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  4. T. Sakamoto
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  5. R. Otsuka
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Yamazaki, A., Inoue, Y., Koike, M. et al. Preparation and dehydration behaviour of thomsonite with ideal chemical composition. Journal of Thermal Analysis 40, 85–97 (1993). https://doi.org/10.1007/BF02546558

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  • DOI: https://doi.org/10.1007/BF02546558

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