data_global _chemical_name_mineral 'Bastnasite-(La)' loop_ _publ_author_name 'Oftedal I' _journal_name_full 'Zeitschrift fur Kristallographie' _journal_volume 78 _journal_year 1931 _journal_page_first 462 _journal_page_last 469 _publ_section_title ; Zur kristallstruktur von bastnasit (Ce,La--)FCO3 Note: positions of C and at least one O undetermined ; _database_code_amcsd 0010506 _chemical_compound_source 'Western Cheyenne Canyon, Colorado, USA' _chemical_formula_sum '(La.5 Ce.5) F O2' _cell_length_a 7.094 _cell_length_b 7.094 _cell_length_c 9.718 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 423.536 _exptl_crystal_density_diffrn 4.481 _symmetry_space_group_name_H-M 'P -6 2 c' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-x+y,1/2+z' '-x+y,-x,1/2-z' 'y,x,-z' '-y,x-y,z' 'x-y,-y,1/2+z' 'x,y,1/2-z' '-x,-x+y,-z' '-x+y,-x,z' 'y,x,1/2+z' '-y,x-y,1/2-z' 'x-y,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy La 0.66667 0.66667 0.00000 0.50000 Ce 0.66667 0.66667 0.00000 0.50000 F1 0.00000 0.00000 0.00000 1.00000 F2 0.33333 0.66667 0.00000 1.00000 O 0.33333 0.33333 0.14300 1.00000