Materials 2013, 6(11), 5410-5426; doi:10.3390/ma6115410
Article

Rapid Microwave Synthesis, Characterization and Reactivity of Lithium Nitride Hydride, Li4NH

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Received: 8 October 2013; in revised form: 23 October 2013 / Accepted: 11 November 2013 / Published: 21 November 2013
(This article belongs to the Section Manufacturing Processes and Systems)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Lithium nitride hydride, Li4NH, was synthesised from lithium nitride and lithium hydride over minute timescales, using microwave synthesis methods in the solid state for the first time. The structure of the microwave-synthesised powders was confirmed by powder X-ray diffraction [tetragonal space group I41/a; a = 4.8864(1) Å, c = 9.9183(2) Å] and the nitride hydride reacts with moist air under ambient conditions to produce lithium hydroxide and subsequently lithium carbonate. Li4NH undergoes no dehydrogenation or decomposition [under Ar(g)] below 773 K. A tetragonal–cubic phase transition, however, occurs for the compound at ca. 770 K. The new high temperature (HT) phase adopts an anti-fluorite structure (space group Fm 3̅ m; a = 4.9462(3) Å) with N3− and H ions disordered on the 4a sites. Thermal treatment of Li4NH under nitrogen yields a stoichiometric mixture of lithium nitride and lithium imide (Li3N and Li2NH respectively).
Keywords: nitride; hydride; structure; microwaves; synthesis; hydrogen storage; diffraction; thermal analysis; reactivity
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MDPI and ACS Style

Tapia-Ruiz, N.; Sorbie, N.; Vaché, N.; Hoang, T.K.A.; Gregory, D.H. Rapid Microwave Synthesis, Characterization and Reactivity of Lithium Nitride Hydride, Li4NH. Materials 2013, 6, 5410-5426.

AMA Style

Tapia-Ruiz N, Sorbie N, Vaché N, Hoang TKA, Gregory DH. Rapid Microwave Synthesis, Characterization and Reactivity of Lithium Nitride Hydride, Li4NH. Materials. 2013; 6(11):5410-5426.

Chicago/Turabian Style

Tapia-Ruiz, Nuria; Sorbie, Natalie; Vaché, Nicolas; Hoang, Tuan K.A.; Gregory, Duncan H. 2013. "Rapid Microwave Synthesis, Characterization and Reactivity of Lithium Nitride Hydride, Li4NH." Materials 6, no. 11: 5410-5426.

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