data_global _amcsd_formula_title 'B3 Na3 O6' loop_ _publ_author_name 'Ssu-Mien Fang' _journal_name_full 'Zeitschrift fur Kristallographie' _journal_volume 99 _journal_year 1938 _journal_page_first 1 _journal_page_last 8 _publ_section_title ; The crystal structure of sodium metaborate Na3 B3 O6 _cod_database_code 1010015 ; _database_code_amcsd 0016948 _chemical_formula_sum 'Na B O2' _cell_length_a 7.22 _cell_length_b 7.22 _cell_length_c 7.22 _cell_angle_alpha 111.48 _cell_angle_beta 111.48 _cell_angle_gamma 111.48 _cell_volume 266.011 _exptl_crystal_density_diffrn 2.464 _symmetry_space_group_name_H-M 'R -3 c' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2-x,1/2-z,1/2-y' '-z,-x,-y' '1/2+y,1/2+x,1/2+z' 'y,z,x' '1/2-z,1/2-y,1/2-x' '-x,-y,-z' '1/2+x,1/2+z,1/2+y' 'z,x,y' '1/2-y,1/2-x,1/2-z' '-y,-z,-x' '1/2+z,1/2+y,1/2+x' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Na1 0.69600 -0.19600 0.25000 B1 0.36200 0.13800 0.25000 O1 0.47900 0.02100 0.25000 O2 0.13800 0.36200 0.25000