data_global _chemical_name_mineral 'Gwihabaite' loop_ _publ_author_name 'Amoros J L' 'Arrese F' 'Canut M' _journal_name_full 'Zeitschrift fur Kristallographie' _journal_volume 117 _journal_year 1962 _journal_page_first 92 _journal_page_last 107 _publ_section_title ; The crystal structure of the low-temperature phase of NH4NO3(V) at -150 deg C Note: sample at T = -150 C, this is a low temperature form ; _database_code_amcsd 0010592 _chemical_formula_sum 'N2 O3 H4' _cell_length_a 7.98 _cell_length_b 7.98 _cell_length_c 9.78 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 622.794 _exptl_crystal_density_diffrn 1.707 _symmetry_space_group_name_H-M 'P 42' loop_ _space_group_symop_operation_xyz 'x,y,z' '-y,x,1/2+z' '-x,-y,z' 'y,-x,1/2+z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv N 0.25000 0.25000 0.51800 0.00887 O1 0.12000 0.27000 0.45600 0.00887 O2 0.38000 0.23000 0.45600 0.00887 O3 0.25000 0.25000 0.64200 0.00887 N* 0.25000 0.25000 0.01800 0.00887 O*1 0.12000 0.23000 0.95600 0.00887 O*2 0.38000 0.27000 0.95600 0.00887 O*3 0.25000 0.25000 0.14200 0.00887 N 0.00000 0.00000 0.25000 0.00887 H1 0.07600 0.07600 0.19000 0.00887 H2 0.07600 -0.07600 0.31000 0.00887 N* 0.50000 0.00000 0.25000 0.00887 H*1 0.57600 0.07600 0.19000 0.00887 H*2 0.42400 0.07600 0.31000 0.00887 N* 0.50000 0.50000 0.25000 0.00887 H*1 0.42400 0.42400 0.31000 0.00887 H*2 0.42400 0.57600 0.19000 0.00887 N** 0.00000 0.50000 0.25000 0.00887 H**1 -0.07600 0.42400 0.31000 0.00887 H**2 -0.07600 0.57600 0.19000 0.00887