data_global _amcsd_formula_title 'Ge4 K10 Nb22 O68' loop_ _publ_author_name 'Choisnet J' 'Hervieu M' 'Groult D' 'Raveau B' _journal_name_full 'Materials Research Bulletin' _journal_volume 12 _journal_year 1977 _journal_page_first 621 _journal_page_last 627 _publ_section_title ; Nouvelles phases multiples obtenues par intercroissance des reseaux "M6X4O26" et "M8O21": les oxydes K10(M8O21)2*M6X4O26 (M=Nb,Ta)(X=Ge,Si) _cod_database_code 1001276 ; _database_code_amcsd 0014256 _chemical_formula_sum 'K4.998 Nb11 Ge2 O34' _cell_length_a 9.112 _cell_length_b 9.112 _cell_length_c 20.01 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 1438.816 _exptl_crystal_density_diffrn 4.401 _symmetry_space_group_name_H-M 'P -6 2 m' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x,-x+y,z' '-x+y,-x,-z' 'y,x,-z' '-y,x-y,z' 'x-y,-y,z' 'x,y,-z' '-x,-x+y,-z' '-x+y,-x,z' 'y,x,z' '-y,x-y,-z' 'x-y,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy K1 0.34400 0.00000 0.00000 0.83300 K2 0.59800 0.00000 0.29700 0.83300 K3 0.54700 0.00000 0.50000 0.83300 Nb1 0.74400 0.00000 0.09000 1.00000 Nb2 0.25100 0.00000 0.21500 1.00000 Nb3 0.23400 0.00000 0.40300 1.00000 Nb4 0.33333 0.66667 0.14900 1.00000 Ge1 0.33333 0.66667 0.41000 1.00000 O1 0.79000 0.00000 0.00000 1.00000 O2 0.17900 0.00000 0.10600 1.00000 O3 0.82200 0.50900 0.09200 1.00000 O4 0.18200 0.50200 0.20900 1.00000 O5 0.79500 0.00000 0.19300 1.00000 O6 0.20200 0.00000 0.31000 1.00000 O7 0.20600 0.48300 0.36700 1.00000 O8 0.25200 0.00000 0.50000 1.00000 O9 0.79900 0.00000 0.41200 1.00000 O10 0.33333 0.66667 0.50000 1.00000