New ternary compound La8Al13Sn3
来源期刊：Rare Metals2009年第5期
论文作者：HE Weia, XIA Xiuwena, ZHANG Jilianga, HUANG Jinlia, b, and LIU Yixina a Key Laboratory of Nonferrous Metal Materials and New Processing Technology (Ministry of Education), College of Materials Science and Engineering, Guangxi Uni- versity, Nanning , China b Department of Physics and Electronic Information Science, Guangxi Teachers Education University, Nanning , China
文章页码：491 - 493
摘 要：A new ternary compound La8Al13Sn3 was synthesized and studied by means of X-ray powder diffraction technique. The compound La8Al13Sn3 crystallizes in a hexagonal AlB2-type structure with space group P6/mmm （No. 191） and the lattice parameters a = 0.44919（1） nm and c = 0.43835（1） nm. The Smith and Snyder figure of merit for index, FN, is F30 = 197.3（30）. The Rietveld refinement for the crystal structure of the compound was carried out successfully. The liability R-factors of Rietveld refinement are Rp = 0.114 and Rwp = 0.148. The compound La8Al13Sn3 decomposes into LaAl2 with cubic structure and space group Fd 3m （227）, LaAl3 with hexagonal structure and space group P63/mmc （194）, and Sn at 720°C.
HE Weia, XIA Xiuwena, ZHANG Jilianga, HUANG Jinlia, b, and LIU Yixina a Key Laboratory of Nonferrous Metal Materials and New Processing Technology (Ministry of Education), College of Materials Science and Engineering, Guangxi Uni- versity, Nanning 530004, China b Department of Physics and Electronic Information Science, Guangxi Teachers Education University, Nanning 530023, China
摘 要：A new ternary compound La8Al13Sn3 was synthesized and studied by means of X-ray powder diffraction technique. The compound La8Al13Sn3 crystallizes in a hexagonal AlB2-type structure with space group P6/mmm （No. 191） and the lattice parameters a = 0.44919（1） nm and c = 0.43835（1） nm. The Smith and Snyder figure of merit for index, FN, is F30 = 197.3（30）. The Rietveld refinement for the crystal structure of the compound was carried out successfully. The liability R-factors of Rietveld refinement are Rp = 0.114 and Rwp = 0.148. The compound La8Al13Sn3 decomposes into LaAl2 with cubic structure and space group Fd 3m （227）, LaAl3 with hexagonal structure and space group P63/mmc （194）, and Sn at 720°C.
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