data_global _amcsd_formula_title 'Co4 Nb2 O9' loop_ _publ_author_name 'Bertaut F' 'Corliss L' 'Forrat F' _journal_name_full 'Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences' _journal_volume 251 _journal_year 1960 _journal_page_first 1733 _journal_page_last 1735 _publ_section_title ; Structure cristallographique et magnetique de niobates et tantalates de metaux de transition bivalents. _cod_database_code 1008925 ; _database_code_amcsd 0016792 _chemical_formula_sum 'Nb2 Co4 O9' _cell_length_a 5.177 _cell_length_b 5.177 _cell_length_c 14.168 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 328.848 _exptl_crystal_density_diffrn 5.711 _symmetry_space_group_name_H-M 'P -3 c 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '-y,-x,1/2+z' 'y,-x+y,-z' '-x,-x+y,1/2-z' '-x+y,-x,z' '-x+y,y,1/2+z' '-x,-y,-z' 'y,x,1/2-z' '-y,x-y,z' 'x,x-y,1/2+z' 'x-y,x,-z' 'x-y,-y,1/2-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Nb1 0.00000 0.00000 0.36000 Co1 0.33333 0.66667 0.02700 Co2 0.33333 0.66667 0.30700 O1 0.30500 0.00000 0.25000 O2 0.33333 0.29500 0.08300