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 = 20 K Note: alpha phase ; _database_code_amcsd 0013001 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'N' _cell_length_a 5.649 _cell_length_b 5.649 _cell_length_c 5.649 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 180.266 _exptl_crystal_density_diffrn 0.516 _symmetry_space_group_name_H-M 'P 21 3' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2-z,-x,1/2+y' '-z,1/2+x,1/2-y' '1/2+z,1/2-x,-y' 'z,x,y' '1/2+y,1/2-z,-x' '1/2-y,-z,1/2+x' '-y,1/2+z,1/2-x' 'y,z,x' '-x,1/2+y,1/2-z' '1/2+x,1/2-y,-z' '1/2-x,-y,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 0.03000 0.03000 0.03000 0.01773