data_global _chemical_name_mineral 'Pyrochlore' loop_ _publ_author_name 'Brandenberger E' _journal_name_full 'Zeitschrift fur Kristallographie' _journal_volume 76 _journal_year 1931 _journal_page_first 322 _journal_page_last 334 _publ_section_title ; Die Kristallstruktur des Koppit _cod_database_code 1011136 ; _database_code_amcsd 0018025 _chemical_formula_sum '(Na.375 K.25 Ca1.125 Ce.25) (Fe.375 Nb1.625) O6.75 F.25' _cell_length_a 10.39 _cell_length_b 10.39 _cell_length_c 10.39 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 1121.622 _exptl_crystal_density_diffrn 4.538 _symmetry_space_group_name_H-M 'F d 3 m' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2+y,1/2+z' '1/2+x,y,1/2+z' '1/2+x,1/2+y,z' '3/4+z,3/4-x,1/4+y' '3/4+z,1/4-x,3/4+y' '1/4+z,3/4-x,3/4+y' '1/4+z,1/4-x,1/4+y' '-y,1/2+z,1/2-x' '-y,+z,-x' '1/2-y,1/2+z,-x' '1/2-y,+z,1/2-x' '3/4+x,3/4-y,1/4+z' '3/4+x,1/4-y,3/4+z' '1/4+x,3/4-y,3/4+z' '1/4+x,1/4-y,1/4+z' '-z,1/2+x,1/2-y' '-z,+x,-y' '1/2-z,1/2+x,-y' '1/2-z,+x,1/2-y' '3/4+y,3/4-z,1/4+x' '3/4+y,1/4-z,3/4+x' '1/4+y,3/4-z,3/4+x' '1/4+y,1/4-z,1/4+x' '-x,1/2+y,1/2-z' '-x,+y,-z' '1/2-x,1/2+y,-z' '1/2-x,+y,1/2-z' '1/2+x,-z,1/2-y' '1/2+x,1/2-z,-y' '+x,-z,-y' '+x,1/2-z,1/2-y' '3/4-z,3/4+y,1/4+x' '3/4-z,1/4+y,3/4+x' '1/4-z,3/4+y,3/4+x' '1/4-z,1/4+y,1/4+x' '1/2+y,-x,1/2-z' '1/2+y,1/2-x,-z' '+y,-x,-z' '+y,1/2-x,1/2-z' '3/4-x,3/4+z,1/4+y' '3/4-x,1/4+z,3/4+y' '1/4-x,3/4+z,3/4+y' '1/4-x,1/4+z,1/4+y' '1/2+z,-y,1/2-x' '1/2+z,1/2-y,-x' '+z,-y,-x' '+z,1/2-y,1/2-x' '3/4-y,3/4+x,1/4+z' '3/4-y,1/4+x,3/4+z' '1/4-y,3/4+x,3/4+z' '1/4-y,1/4+x,1/4+z' 'x,1/2+z,1/2+y' 'x,+z,+y' '1/2+x,1/2+z,+y' '1/2+x,+z,1/2+y' '1/4-z,3/4-y,3/4-x' '1/4-z,1/4-y,1/4-x' '3/4-z,3/4-y,1/4-x' '3/4-z,1/4-y,3/4-x' 'y,1/2+x,1/2+z' 'y,+x,+z' '1/2+y,1/2+x,+z' '1/2+y,+x,1/2+z' '1/4-x,3/4-z,3/4-y' '1/4-x,1/4-z,1/4-y' '3/4-x,3/4-z,1/4-y' '3/4-x,1/4-z,3/4-y' 'z,1/2+y,1/2+x' 'z,+y,+x' '1/2+z,1/2+y,+x' '1/2+z,+y,1/2+x' '1/4-y,3/4-x,3/4-z' '1/4-y,1/4-x,1/4-z' '3/4-y,3/4-x,1/4-z' '3/4-y,1/4-x,3/4-z' '3/4+z,1/4+x,3/4-y' '3/4+z,3/4+x,1/4-y' '1/4+z,1/4+x,1/4-y' '1/4+z,3/4+x,3/4-y' '-y,1/2-z,1/2+x' '-y,-z,+x' '1/2-y,1/2-z,+x' '1/2-y,-z,1/2+x' '3/4+x,1/4+y,3/4-z' '3/4+x,3/4+y,1/4-z' '1/4+x,1/4+y,1/4-z' '1/4+x,3/4+y,3/4-z' '-z,1/2-x,1/2+y' '-z,-x,+y' '1/2-z,1/2-x,+y' '1/2-z,-x,1/2+y' '3/4+y,1/4+z,3/4-x' '3/4+y,3/4+z,1/4-x' '1/4+y,1/4+z,1/4-x' '1/4+y,3/4+z,3/4-x' '-x,1/2-y,1/2+z' '-x,-y,+z' '1/2-x,1/2-y,+z' '1/2-x,-y,1/2+z' '1/4-z,3/4+x,3/4+y' '1/4-z,1/4+x,1/4+y' '3/4-z,3/4+x,1/4+y' '3/4-z,1/4+x,3/4+y' 'y,-z,-x' 'y,1/2-z,1/2-x' '1/2+y,-z,1/2-x' '1/2+y,1/2-z,-x' '1/4-x,3/4+y,3/4+z' '1/4-x,1/4+y,1/4+z' '3/4-x,3/4+y,1/4+z' '3/4-x,1/4+y,3/4+z' 'z,-x,-y' 'z,1/2-x,1/2-y' '1/2+z,-x,1/2-y' '1/2+z,1/2-x,-y' '1/4-y,3/4+z,3/4+x' '1/4-y,1/4+z,1/4+x' '3/4-y,3/4+z,1/4+x' '3/4-y,1/4+z,3/4+x' 'x,-y,-z' 'x,1/2-y,1/2-z' '1/2+x,-y,1/2-z' '1/2+x,1/2-y,-z' '1/2-x,1/2+z,-y' '1/2-x,+z,1/2-y' '-x,1/2+z,1/2-y' '-x,+z,-y' '1/4+z,3/4-y,3/4+x' '1/4+z,1/4-y,1/4+x' '3/4+z,3/4-y,1/4+x' '3/4+z,1/4-y,3/4+x' '1/2-y,1/2+x,-z' '1/2-y,+x,1/2-z' '-y,1/2+x,1/2-z' '-y,+x,-z' '1/4+x,3/4-z,3/4+y' '1/4+x,1/4-z,1/4+y' '3/4+x,3/4-z,1/4+y' '3/4+x,1/4-z,3/4+y' '1/2-z,1/2+y,-x' '1/2-z,+y,1/2-x' '-z,1/2+y,1/2-x' '-z,+y,-x' '1/4+y,3/4-x,3/4+z' '1/4+y,1/4-x,1/4+z' '3/4+y,3/4-x,1/4+z' '3/4+y,1/4-x,3/4+z' '-x,-z,y' '-x,1/2-z,1/2+y' '1/2-x,-z,1/2+y' '1/2-x,1/2-z,y' '3/4+z,3/4+y,1/4-x' '3/4+z,1/4+y,3/4-x' '1/4+z,3/4+y,3/4-x' '1/4+z,1/4+y,1/4-x' '-y,-x,z' '-y,1/2-x,1/2+z' '1/2-y,-x,1/2+z' '1/2-y,1/2-x,z' '3/4+x,3/4+z,1/4-y' '3/4+x,1/4+z,3/4-y' '1/4+x,3/4+z,3/4-y' '1/4+x,1/4+z,1/4-y' '-z,-y,x' '-z,1/2-y,1/2+x' '1/2-z,-y,1/2+x' '1/2-z,1/2-y,x' '3/4+y,3/4+x,1/4-z' '3/4+y,1/4+x,3/4-z' '1/4+y,3/4+x,3/4-z' '1/4+y,1/4+x,1/4-z' '1/4-z,1/4-x,1/4-y' '1/4-z,3/4-x,3/4-y' '3/4-z,1/4-x,3/4-y' '3/4-z,3/4-x,1/4-y' 'y,z,x' 'y,1/2+z,1/2+x' '1/2+y,z,1/2+x' '1/2+y,1/2+z,x' '1/4-x,1/4-y,1/4-z' '1/4-x,3/4-y,3/4-z' '3/4-x,1/4-y,3/4-z' '3/4-x,3/4-y,1/4-z' 'z,x,y' 'z,1/2+x,1/2+y' '1/2+z,x,1/2+y' '1/2+z,1/2+x,y' '1/4-y,1/4-z,1/4-x' '1/4-y,3/4-z,3/4-x' '3/4-y,1/4-z,3/4-x' '3/4-y,3/4-z,1/4-x' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy Na1 0.62500 0.62500 0.62500 0.18750 K1 0.62500 0.62500 0.62500 0.12500 Ca1 0.62500 0.62500 0.62500 0.56250 Ce1 0.62500 0.62500 0.62500 0.12500 Fe1 0.12500 0.12500 0.12500 0.18750 Nb1 0.12500 0.12500 0.12500 0.81250 O1 0.19000 0.00000 0.00000 1.00000 O2 0.50000 0.50000 0.50000 0.37500 O3 0.50000 0.50000 0.50000 0.37500 F1 0.50000 0.50000 0.50000 0.25000