LaNi<SUB>5</SUB>D<SUB>x</SUB>(x=0, 0.3)化合物的中子粉末衍射研究

樊志剑; 陈 波; 孙光爱; 薛艳杰; 陈东风; 张晓安

doi:10.7538/yzk.2006.40.01.0111

LaNi₅D_x(x=0, 0.3)化合物的中子粉末衍射研究

1.
中国工程物理研究院核物理与化学研究所,四川绵阳 621900
2.
中国原子能科学研究院核物理研究所,北京 102413

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中图分类号: TG115.23
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出版历程
- 收稿日期: 2004-04-23
- 修回日期: 2004-10-22
- 刊出日期: 2006-01-19

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

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

摘要

摘要: 利用中子粉末衍射实验研究了LaNi₅、LaNi₅D_0.3的晶体结构。在对LaNi₅D_0.3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，LaNi₅D_0.3的空间群仍为P6/mmm。LaNi₅D_0.3中氘原子占据12n位。
- LaNi₅ ,
- 晶体结构 ,
- 中子粉末衍射
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_0.3deuteride 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.
- LaNi₅ ,
- crystallographic structure ,
- neutron powder

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[1]

Van VUCHT J H N, KUIJPERS F A, BRUNING H C A M. Reversible room temperature absorption of large quantities of hydrogen by intermetallic compounds[J]. Philips Res Repts, 1970, 25(2):133-140.[2] RIETVELD H M. A profile refinement method for nuclear and magnetic structures [J]. J Appl Cryst, 1969, 2(2):65-71.[3] RODRIGUEZ CARVAJAL J. FULLPROF: A program for rietveld refinement and pattern matching analysis [C] // Abstracts of the satellite meeting on powder diffraction of the XVth congress of the international union of crystallography. Toulouse: IUCr, 1990:127.[4] THOMPSON P, COX D E, HASTINGS J B. Rietveld refinement of debye scherrer synchrotron X-ray data from Al₂O₃[J]. J Appl Cryst, 1987, 20(2):79-83.[5] CAGLIOTI G, PAOLETTI A, RICCI F P. Choice of collimators for a crystal spectrometer for neutron diffraction[J]. Nucl Instrum Methods, 1958, 3 (4):223-228.[6] LATROCHE M, RODRIGUEZ CARVAJAL J, PERCHERON GUEGAN A, et al. Structural studies of LaNi₄-CoD_6.11 and LaNi_3.55Mn_0.4Al_0.3Co_0.75D_5.57 by means of neutron powder diffraction[J]. J Alloys Comp, 1995, 218(1):64-72.[7] WU E, GRAY EMacA, KISI E H. Modelling dislocation induced anisotropic line broadening in rietveld refinements using a voigt functionⅠ. General principles[J]. J Appl Cryst, 1998, 31(3):356-362.[8] WU E, GRAY EMacA, KISI E H. Modelling dislocation induced anisotropic line broadening in rietveld refinements using a voigt functionⅡ. Application to neutron powder diffraction data[J]. J Appl Cryst, 1998, 31(3):363-368. [9] PERCHERON GUEGAN A, LARTIGUE C, ACHARD J C, et al. Neutron and X-ray diffraction profile analyses and structure of LaNi₅, LaNi_5-xAl_x and LaNi_5-xMn_x intermetallics and their hydrides (deuterides)[J]. J Less Common Met, 1980,74(1):1-12.[10] YOUNG R A, PRINCE E, SPARKS R A. Suggested guidelines for the publication of rietveld analyses and pattern decompostion studies[J]. J Appl Cryst, 1982, 15(3):357-359.

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LaNi5Dx(x=0, 0.3)化合物的中子粉末衍射研究

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Investigation of Compounds LaNi5Dx(x=0, 0.3) by Means of Neutron Powder Diffraction

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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