Direct Reaction of Nitrogen and Lithium up to 75 GPa - Synthesis of the Li3N, LiN, LiN2, and LiN5 Compounds
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2018-08-23 |
| Journal | Inorganic Chemistry |
| Authors | Dominique Laniel, Gunnar Weck, Paul Loubeyre |
| Institutions | Commissariat à l’Énergie Atomique et aux Énergies Alternatives, Centre National d’Études Spatiales |
| Citations | 64 |
Abstract
Section titled “Abstract”A wide variety of Li-N compounds are predicted as stable under pressure and associated with various nitrogen anionic moieties. Accordingly, the LiN<sub>5</sub> compound was recently synthesized at 45 GPa by the direct reaction of nitrogen and lithium. In this study, we present an experimental investigation of the Li-N binary phase diagram from ambient pressure up to 73.6 GPa. The samples loaded in the diamond anvil cells were constituted of pure lithium pieces embedded in a much greater quantity of molecular nitrogen and, at incremental pressure steps, were laser-heated to produce the thermodynamically favored solid. The following compounds are observed: Li<sub>3</sub>N, LiN<sub>2</sub>, LiN as well as LiN<sub>5</sub>, and their pressure stability domain is disclosed. Two are synthesized for the first time, namely Cmcm LiN and P6<sub>3</sub>/ mmc LiN<sub>2</sub>. Both are structurally resolved and characterized by X-ray diffraction and Raman spectroscopy measurements. Their high bulk modulus is characteristic of charged N<sub>2</sub> dimers.
Tech Support
Section titled “Tech Support”Original Source
Section titled “Original Source”References
Section titled “References”- 1963 - Handbook of Preparative Inorgative Chemistry
- 1977 - Energetic Materials [Crossref]