The crystal structure of ammonium oxide

At. low temperatures ammonia forms two stable hydrates NH3 0H20 and 2NH3 0H20, ainmonium hydroxide and ammonium oxide respectively0 The lattice constants of the hydroxide and the crystal structure of the oxide have been determined at -100 000 The structure of aimnonium oxide contains planar chains of alternating ammonia and water molecules bonded by hydrogen bonds of the 0-H--N and N-H--O type The chains s: are cross linked into a three dimensional lattice by hydrogen bonds of the latter type0 The open spaces in the lattice contain the remaining ammonia molecules each having a single hydrogen bond to the molecular