Accurate Analysis and Visualization of Crystal Structure of Synthetic Zeolite-A by X-Ray Powder Diffractometry

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  • 粉末回折法による合成Ａ型ゼオライトの結晶構造の高精度解析と可視化
  • フンマツ カイセツホウ ニ ヨル ゴウセイ Aガタ ゼオライト ノ ケッショウ コウゾウ ノ コウセイド カイセキ ト カシカ

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Description

The crystal structure (Na96Al96Si96O384·183.7H2O) and the phase content of synthetic zeolite-A were determined by X-ray powder diffraction data using the Rietveld method. The result of a Rietveld refinement for a structure determination gave Rwp = 9.42% and S = 1.52. The electron density image, calculated with the maximum-entropy method, proved the reliablity of the refined crystal structure. The content of zeolite-A calculated by a scale factor obtained by the Rietveld refinement was 74.8 mass%, which was identical to the value of 74.3 mass% by Vonk's crystallinity analysis. The residue of zeolite-A might be an amorphous or amorphous-like phase. The number of bond water calculated by the Rietveld refinement was 184, the same as that of thermogravimetry.<br>

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 55 (6), 397-404, 2006

    The Japan Society for Analytical Chemistry

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