AM_Phosphammite
Formula: N2 H9 P O4
Name: Phosphammite
Unit cell: 11.043 6.7 8.031 90.0 113.42 90.0 , V=545.25
Space group: P121/C1 (14)

Khan A A , Roux J P , James W J , Acta Crystallographica, Section B , 28 (1972) p.2065-2069, The crystal structure of diammonium hydrogen phosphate, (NH4)2HPO4