摘要
分别测量了LaNi4 2 5Al0 .75和LaNi4 75Al0 .2 5两种合金样品在未吸氘及不同含氘量的氘化物样品的中子衍射谱 ,用Rietveld程序拟合出它们的晶体结构 ,并观察到了一些过去未曾注意的现象。LaNi4 2 5 Al0 .75在吸氘过程中 ,氘原子优先占据的原子坐标为 (0 17,0 3 2 ,0 45 )。
LaNi 4 25 Al 0.75 and LaNi 4 75 Al 0.25 alloys and their different capacity deuterides are studied by neutron powder diffraction. The crystal structure and atom occupancy are calculated using Rietveld program. Some phenomena are observed and not noticed before. We point out that the deuterium atom will occupy the prior position of (0.17,0.32,0.45) when the alloy absorbs deuterium.
出处
《原子能科学技术》
EI
CAS
CSCD
2002年第4期447-449,共3页
Atomic Energy Science and Technology
基金
中国工程物理研究院科学基金资助项目(990 2 1 6)
