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

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<

SUBMITTER: Tapia-Ruiz N 

PROVIDER: S-EPMC5452770 | biostudies-literature | 2013 Nov

REPOSITORIES: biostudies-literature