data_global _amcsd_formula_title 'Rb3Nb5P2O19' loop_ _publ_author_name 'Leclaire A' 'Borel M' 'Chardon J' 'Raveau B' _journal_name_full 'Journal of Solid State Chemistry' _journal_volume 111 _journal_year 1994 _journal_page_first 26 _journal_page_last 32 _publ_section_title ; A phosphoniobate with an intersecting tunnel structure related to pyrochlore: Rb3Nb5P2O19 _cod_database_code 1001623 ; _database_code_amcsd 0013809 _chemical_formula_sum 'Nb5 Rb3 P2 O19' _cell_length_a 12.989 _cell_length_b 12.989 _cell_length_c 53.91199 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 7877.119 _exptl_crystal_density_diffrn 4.124 _symmetry_space_group_name_H-M 'R -3 c' loop_ _space_group_symop_operation_xyz 'x,y,z' '2/3+x,1/3+y,1/3+z' '1/3+x,2/3+y,2/3+z' 'x,x-y,1/2+z' '2/3+x,1/3+x-y,5/6+z' '1/3+x,2/3+x-y,1/6+z' 'y,x,1/2-z' '2/3+y,1/3+x,5/6-z' '1/3+y,2/3+x,1/6-z' '-x+y,y,1/2+z' '2/3-x+y,1/3+y,5/6+z' '1/3-x+y,2/3+y,1/6+z' '-x,-x+y,1/2-z' '2/3-x,1/3-x+y,5/6-z' '1/3-x,2/3-x+y,1/6-z' '-y,-x,1/2+z' '2/3-y,1/3-x,5/6+z' '1/3-y,2/3-x,1/6+z' 'x-y,-y,1/2-z' '2/3+x-y,1/3-y,5/6-z' '1/3+x-y,2/3-y,1/6-z' 'y,-x+y,-z' '2/3+y,1/3-x+y,1/3-z' '1/3+y,2/3-x+y,2/3-z' '-x+y,-x,z' '2/3-x+y,1/3-x,1/3+z' '1/3-x+y,2/3-x,2/3+z' '-x,-y,-z' '2/3-x,1/3-y,1/3-z' '1/3-x,2/3-y,2/3-z' '-y,x-y,z' '2/3-y,1/3+x-y,1/3+z' '1/3-y,2/3+x-y,2/3+z' 'x-y,x,-z' '2/3+x-y,1/3+x,1/3-z' '1/3+x-y,2/3+x,2/3-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Nb1 0.00000 0.00000 0.00000 Nb2 0.00000 0.00000 0.15913 Nb3 0.16987 0.14913 0.05416 Nb4 0.01723 0.16947 0.21506 Rb1 0.67230 0.00000 0.25000 Rb2 0.65290 0.00310 0.32112 P1 0.21870 0.21650 0.11778 O1 0.12630 0.12230 0.02055 O2 0.11890 0.13190 0.13426 O3 0.00630 0.12550 0.17797 O4 0.17440 0.20560 0.40892 O5 0.12300 -0.00950 0.06028 O6 0.33140 0.19570 0.04485 O7 0.21890 0.32990 0.04840 O8 0.13250 0.12560 0.21878 O9 0.00000 0.19010 0.25000 O10 -0.10410 0.22720 0.20524