Hydrogen in Ce2Ni1-xSi1+x and Ce6Ni2Si3 compounds

Hydrogen interaction with Ce2N0.8Si1.2, Ce2NiSi, Ce2Ni1.2Si0.8 and Ce6Ni2Si 3 compounds were studied. The new hydride phases containing 3.7, 4.4, 4.9, and 10.9 hydrogen atoms per formula unit correspondingly, have been synthes ized and characterized by X-ray diffraction and thermodesorption methods. A ll hydrides preserved structure type of the starting compounds with pronoun ced anisotropic distortion of crystal lattice. Some suggestions on hydrogen localization in interstitial sites have been proposed. (C) 1999 Internatio nal Association for Hydrogen Energy. Published by Elsevier Science Ltd. All rights reserved.