リートベルト解析プログラムRIETANの新バージョンを用いた構造精密化

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タイトル別名
  • Structure Refinements with a New Version of the Rietveld-Refinement Program RIETAN
  • リートベルト カイセキ プログラム RIETAN ノ シン バージョン オ モ

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説明

A new version of the Rietveld-refinement program RIETAN has been developed for the analysis of angle-dispersive X-ray and neutron powder diffraction data. It has several features such as the modified pseudo-Voigt function of Thompson, Cox and Hastings, representation of peak asymmetry by a multi-term Simpson's rule integration, the March-Dollase function to correct for preferred orientation, and a background function consisting of Legendre polynomials. Powder diffraction data of four inorganic compounds were analyzed with this program to test its effectiveness. In all the refinements, the new version of RIETAN gave lower R factors than the old one. The result of Rietveld refinement for anatase-type Ti0.85Sn0.15O2 showed that the model function implemented in the new program well fits its X-ray powder diffraction pattern exhibiting anisotropic strain broadening.

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