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Lithium I 0400Reactivity of Hydrogen and Ternary Nitrides Containing Lithium and 13 Group Elements. -The compounds Li3XN2 (X: B, Al, Ga) are synthesized by solid state reaction of Li3N and XN (973-1073 K, 3-12 h). As revealed by powder XRD, Li3GaN2 crystallizes in the cubic space group Ia3. The compound reacts with 3.4 mass% of H2 gas at 573 K to form a mixture of LiNH2, LiH, and GaN. After this reaction, 1.7 mass% of H 2 is released in the desorption process under reduced pressure. -(YAMANE*, H.; KANO, T.; KAMEGAWA, A.; SHIBATA, M.; YAMADA, T.; OKADA, M.; SHIMADA, M.; J. Alloys Compd. 402 (2005) 1-2, L1-L3; Cent. Interdisc. Res.,