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LaNi₅D_x（x=0,0·3）化合物的中子粉末衍射研究

Investigation of Compounds LaNi₅D_x（x=0,0.3） by Means of Neutron Powder Diffraction

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【Author】 FAN Zhi-jian~(1),CHEN Bo~(1),SUN Guang-ai~(1),XUE Yan-jie~(2),CHEN Dong-feng~(2),ZHANG Xiao-an~(1)(1.China Academy of Engineering Physics,P.O.Box 919-213,Mianyang 621900,China;2.China Institute of Atomic Energy,P.O.Box 275-30,Beijing 102413,China)

【机构】中国工程物理研究院核物理与化学研究所；中国原子能科学研究院核物理研究所；中国工程物理研究院核物理与化学研究所四川绵阳621900；四川绵阳621900；北京102413；

【摘要】利用中子粉末衍射实验研究了LaNi5、LaNi5D0.3的晶体结构。在对LaNi5D0.3的中子粉末衍射数据进行分析时,考虑了吸、放气过程中引入的微应变会使得衍射轮廓产生各向异性展宽的因素,从而使拟合效果取得较明显的改善。与LaNi5一样,LaNi5D0.3的空间群仍为P6/mmm。LaNi5D0.3中氘原子占据12n位。更多还原

【Abstract】 The structural properties of intermetallic compound LaNi₅ and its deuteride LaNi₅D_0.3 were studied by means of neutron powder diffraction.The data analysis of(LaNi₅D_0.3) deuteride was performed taking into account the anisotropic diffraction line broadening due to microstrain introduced during the hydrogenation-dehydrogenation（cycles）.Therefore,the fit to experimental data is achieved.LaNi₅D_0.3 is crystallized in the space group P6/mmm as well as LaNi₅ and the 12n site is occupied by D atom in it.更多还原