期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 358, 期 1-2, 页码 142-145出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/S0925-8388(03)00136-1
关键词
hydrogen absorbing materials; metal hydrides; crystal structure; neutron diffraction
The structure of NaAlD4 has been determined from Rietveld-type refinements of powder neutron diffraction data at 8 and 295 K. The space group is I4(1) la with a = 501.19(l) and c = 1131.47(5) pm at 295 K. The Na atoms are surrounded by eight D atoms from eight different [AlD4](-) tetrahedra in the geometry of a distorted square antiprism. The two different Na-D distances are nearly equal: 240.3(2) and 240.5(2) pm at 8 K and 243.1(2) and 243.9(2) pm at 295 K. The Al-D distance is 162.7(2) and 162.6(2) pm at 8 and 295 K, respectively. (C) 2003 Elsevier B.V. All rights reserved.
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