data_global _amcsd_formula_title 'K4 Nb8 O34 P5' loop_ _publ_author_name 'Benabbas A' 'Borel M' 'Grandin A' 'Leclaire A' 'Raveau B' _journal_name_full 'Journal of Solid State Chemistry' _journal_volume 87 _journal_year 1990 _journal_page_first 360 _journal_page_last 365 _publ_section_title ; The niobium phosphate bronze K5-xNb8P5O34, a new tunnel structure, first member of the series (K3Nb6P4O26)n . KNb2PO8 _cod_database_code 1001449 ; _database_code_amcsd 0013681 _chemical_formula_sum 'Nb8 P5 K4 O34' _cell_length_a 13.904 _cell_length_b 6.453 _cell_length_c 20.64 _cell_angle_alpha 90 _cell_angle_beta 125.05 _cell_angle_gamma 90 _cell_volume 1516.038 _exptl_crystal_density_diffrn 3.502 _symmetry_space_group_name_H-M 'P 1 2/c 1' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,-y,1/2+z' '-x,y,1/2-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy Nb1 0.16613 0.98280 0.05406 1.00000 Nb2 0.24102 0.99468 0.26477 1.00000 Nb3 0.53830 0.77407 0.35353 1.00000 Nb4 0.74862 0.77185 0.56941 1.00000 P1 0.00000 0.15290 0.25000 1.00000 P2 0.22103 0.49800 0.05104 1.00000 P3 0.30488 0.49710 0.31915 1.00000 K1 0.50000 0.27430 0.25000 1.00000 K2 0.43960 0.74740 0.51620 0.50000 K3 0.00920 0.64300 0.13600 0.45000 K4 0.04440 0.50400 0.12790 0.32000 K5 0.05710 0.68560 0.33570 0.23000 O1 0.00000 0.00000 0.00000 1.00000 O2 0.18950 -0.01750 0.16190 1.00000 O3 0.34470 -0.03490 0.12350 1.00000 O4 0.17340 -0.05250 -0.03300 1.00000 O5 0.17320 0.29000 0.05730 1.00000 O6 0.15440 0.67210 0.06180 1.00000 O7 0.40830 -0.03970 0.31650 1.00000 O8 0.27680 0.03530 0.37780 1.00000 O9 0.07280 0.01140 0.23310 1.00000 O10 0.25090 0.30560 0.26360 1.00000 O11 0.22550 0.68710 0.27330 1.00000 O12 0.60550 0.78490 0.46970 1.00000 O13 0.42900 0.53290 0.34040 1.00000 O14 0.64750 0.51470 0.38300 1.00000 O15 0.50000 0.72140 0.25000 1.00000 O16 0.69100 0.53820 0.60590 1.00000 O17 0.80200 0.51730 0.53080 1.00000 O18 0.91810 0.71270 0.67700 1.00000