A reactive composite of Mg(BH4)(2)center dot 6NH(3)-xLiH is prepared, and the effects of the LiH content on the dehydrogenation/hydrogenation properties of the material are investigated. The results show that the presence of LiH with x = 3 reduces the onset dehydrogenation temperature of Mg(BH4)(2)center dot 6NH(3) from 130 degrees C to 80 degrees C in TPD mode. Approximately 14.3 wt% hydrogen is released from the Mg(BH4)(2)center dot 6NH(3)-6LiH composite with distinctly reduced ammonia evolution while heating to 340 degrees C. Upon heating, Mg(BH4)(2)center dot 6NH(3) first reacts with LiH to form Mg(NH2)(2), Li3BN2H8 and LiBH4 with the release of H-2 and the evolution of a minor amount of NH3. The newly formed Mg(NH2)(2) then reacts with LiH to produce H-2 and Li2Mg(NH)(2). Further elevating the operating temperature induces chemical reactions between Li2Mg(NH)(2), LiBH4 and Li3BN2H8, causing the release of additional H-2 and production of Li3BN2, LiMgBN2 and LiH. The dehydrogenated sample at 210 degrees C absorbs 2.2 wt% of hydrogen, exhibiting partial reversibility for hydrogen storage. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.