data_global _amcsd_formula_title 'Ge3 Nb O9 Rb' loop_ _publ_author_name 'Choisnet J' 'Deschanvres A' 'Raveau B' _journal_name_full 'Journal of Solid State Chemistry' _journal_volume 4 _journal_year 1972 _journal_page_first 209 _journal_page_last 218 _publ_section_title ; Sur de nouveaux germanates et silicates de type benitoite _cod_database_code 1001076 ; _database_code_amcsd 0013295 _chemical_formula_sum 'Rb Nb Ge3 O9' _cell_length_a 7.038 _cell_length_b 7.038 _cell_length_c 10.132 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 434.635 _exptl_crystal_density_diffrn 4.128 _symmetry_space_group_name_H-M 'P -6 c 2' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,x-y,-z' '-x+y,-x,1/2-z' '-y,-x,1/2+z' '-y,x-y,z' '-x+y,y,-z' 'x,y,1/2-z' 'x,x-y,1/2+z' '-x+y,-x,z' '-y,-x,-z' '-y,x-y,1/2-z' '-x+y,y,1/2+z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Rb1 0.66667 0.33333 0.00000 Nb1 0.33333 0.66667 0.00000 Ge1 0.07100 0.28900 0.25000 O1 0.25300 0.19300 0.25000 O2 0.09800 0.44000 0.11000