A Neutron Diffraction Study of V_2H
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概要
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Hydrogen arrangements in two polymorphic forms,β_1 and β_2, of V_2H have been studied by powder neutron diffraction up to 200℃. The hydrogen atoms in β_1-V_2H are fully ordered in the specific o_z-sites of the body-centered pseudotetragonal vanadium lattice (c_0/a_0≃1.1), forming a monoclinic superstructure (A≃C≃(a^2_0+c^2_0)^<1/2>, B=a_0, β≃2 tan^<-1> c_0/a_0) isomorphic with β-V_2D. The structure of β_2-V_2H, which exists between 175° and 220℃, is partially ordered; the hydrogen atoms are distributed among all the o_z-sites with a probability of 1/2. The hydorogen distribution in the VH superstructure is proposed to be the full occupation of these these sites.
- 社団法人日本物理学会の論文
- 1976-09-15
著者
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Asano Hajime
The Research Institute For Iron Steel And Other Metals
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HIRABAYASHI Makoto
The Research Institute for Iron,Steel and Other Metals,Tohoku University
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Abe Yoshifumi
The Research Institute For Iron Steel And Other Metals Tohoku University
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Hirabayashi Makoto
The Research Institute For Iron Steel And Other Metals
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