Hydrogen interaction with IMC RNi (R = Sm, Tb, Gd, Dy)

被引：5
|
作者：
Yaropolov, Y. L. [1 ]
Verbetsky, V. N. [1 ]
Somenkov, V. A. [2 ]
Glazkov, V. P. [2 ]
机构：
[1] Moscow MV Lomonosov State Univ, Moscow 119992, Russia
[2] RSC Kurchatovsky Inst, Moscow 123182, Russia
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2011年 / 36卷 / 01期
关键词：
Rare-earth intermetallics; Metal hydrides; Crystal chemistry; Diffraction (X-ray neutron); CENI;
D O I：
10.1016/j.ijhydene.2010.06.116
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The hydrogenation of GdNi, TbNi, DyNi and SmNi at room temperature and hydrogen pressure below 1 atm has been studied. Ternary hydrides GdNiH3.2, TbNiH3.4, DyNiH3.4 and SmNiH3.7 crystallize in orthorhombic CrB-type structure (S.G. Cmcm). The hydrides formation is accompanied with the strong lattice expansion. On the basis of neutron diffraction patterns refinement the atomic positions of D atoms and interatomic distances were determined for TbNiD3.4 and DyNiD3.4 samples. Deuterium atoms occupy three types of interstitial sites in the structure of TbNiD3.4 and DyNiD3.4: 4(c)-tetrahedron sites [R3Ni], 8(f)-trigonal bipyramide sites [R3Ni2] and linear 4(b)-sites [Ni-2]. (C) 2010 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
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页码：1222 / 1225
页数：4
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