data_global _chemical_name_mineral 'Salammoniac' loop_ _publ_author_name 'Sirdeshmukh D B' 'Deshpande V T' _journal_name_full 'Acta Crystallographica, Section A' _journal_volume 26 _journal_year 1970 _journal_page_first 295 _journal_page_last 295 _publ_section_title ; X-ray measurement of the thermal expansion of ammonium chloride Sample: T = 31.5 C ; _database_code_amcsd 0009319 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'N Cl' _cell_length_a 3.8771 _cell_length_b 3.8771 _cell_length_c 3.8771 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 58.280 _exptl_crystal_density_diffrn 1.409 _symmetry_space_group_name_H-M 'P m -3 m' loop_ _space_group_symop_operation_xyz 'x,y,z' 'z,-x,y' '-y,z,-x' 'x,-y,z' '-z,x,-y' 'y,-z,x' '-x,y,-z' 'x,-z,-y' '-z,y,x' 'y,-x,-z' '-x,z,y' 'z,-y,-x' '-y,x,z' 'x,z,y' '-z,-y,-x' 'y,x,z' '-x,-z,-y' 'z,y,x' '-y,-x,-z' 'z,x,-y' '-y,-z,x' 'x,y,-z' '-z,-x,y' 'y,z,-x' '-x,-y,z' '-z,x,y' 'y,-z,-x' '-x,y,z' 'z,-x,-y' '-y,z,x' 'x,-y,-z' '-x,z,-y' 'z,-y,x' '-y,x,-z' 'x,-z,y' '-z,y,-x' 'y,-x,z' '-x,-z,y' 'z,y,-x' '-y,-x,z' 'x,z,-y' '-z,-y,x' 'y,x,-z' '-z,-x,-y' 'y,z,x' '-x,-y,-z' 'z,x,y' '-y,-z,-x' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z NH4 0.00000 0.00000 0.00000 Cl 0.50000 0.50000 0.50000