We request 2 days on GEM in conjunction with the IGAn apparatus to investigate the formation of lithium amide (LiNH2) from the interaction of Li3N with ammonia (ND3), and the formation of lithium amide and magnesium amide (Mg(NH2)2) from the interaction of lithium magnesium nitride (LiMgN) with ND3. Recent work at ISIS, in collaboration with the University of Oxford, has highlighted a new synthesis route for lithium amide, whereby lithium nitride interacts directly with ammonia to form lithium amide. A preliminary neutron diffraction study of the formed lithium amide using the GEM diffractometer at ISIS identified its stoichiometry to be Li1.23ND1.77, confirming the thermogravimetric observations. This material is the first ever reported ordered lithium amide with super-stoichiometry in lithium.