Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 302, Issue 1-2, Pages 112-117Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/S0925-8388(00)00581-8
Keywords
hydrogen storage alloy; X-ray diffraction; pressure-composition isotherms; crystal structure
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A new quaternary magnesium based alloy (La0.65Ca0.35)(Mg1.32Ca0.68)Ni-9 and its hydride have been synthesized and their crystal structures were determined by Guinier-Hagg X-ray powder diffraction. The compound has a hexagonal structure and is isostructural with LaMg2Ni9 (AB(2)C(9) type), in which Ca partially occupies both A and B sites. The hydrogen absorption/desorption properties were determined by pressure-composition isotherms and compared with LaMg2Ni9. (La0.65Ca0.35)(Mg1.32Ca0.68)Ni-9 absorbs similar to 1.87 wt.% H-2 at similar to 3.3 MPa H-2 and 283 K. (C) 2000 Elsevier Science S.A. All rights reserved.
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