data_global _chemical_name_mineral 'Nitrogen' loop_ _publ_author_name 'Schuch A F' 'Mills R L' _journal_name_full 'Journal of Chemical Physics' _journal_volume 52 _journal_year 1970 _journal_page_first 6000 _journal_page_last 6008 _publ_section_title ; Crystal structures of the three modifications of nitrogen 14 and nitrogen 15 at high pressure Sample: at T = 49 K and P = .4180 GPa Note: beta phase ; _database_code_amcsd 0013000 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'N' _cell_length_a 3.861 _cell_length_b 3.861 _cell_length_c 6.265 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 80.882 _exptl_crystal_density_diffrn 1.150 _symmetry_space_group_name_H-M 'P 63/m m c' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-x+y,1/2+z' 'x,x-y,1/2-z' '-x+y,-x,1/2-z' 'x-y,x,1/2+z' '-y,-x,z' 'y,x,-z' 'y,-x+y,-z' '-y,x-y,z' 'x-y,-y,1/2+z' '-x+y,y,1/2-z' 'x,y,1/2-z' '-x,-y,1/2+z' 'x,x-y,z' '-x,-x+y,-z' 'x-y,x,-z' '-x+y,-x,z' 'y,x,1/2+z' '-y,-x,1/2-z' '-y,x-y,1/2-z' 'y,-x+y,1/2+z' '-x+y,y,z' 'x-y,-y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv N 0.33333 0.66667 0.33800 0.01773