Observation of novel phases during deuteration of lithium nitride from in situ neutron diffraction
Abstract
We report on in situ neutron diffraction measurements during the deuteration of Li 3N. A number of novel observations are described: The presence of cubic 'quasi-imide' phases with composition-dependent lattice parameters, the identification of Li 4ND and the suppression of LiD formation at low deuterium content. On the basis of these observations, it is proposed that the quasi-imide phase is intermediate between Li 4ND and Li 2ND, having a composition Li 2+ yND. Charge balance is accomplished in this compound by the inclusion of both, formally, D - and D +, the latter species being present in the imide ion, (ND) 2-.
- Publication:
-
Chemical Physics Letters
- Pub Date:
- August 2007
- DOI:
- Bibcode:
- 2007CPL...444...76W
