data_global _amcsd_formula_title 'Ba2 Li3 O21 P7' loop_ _publ_author_name 'El Horr N' 'Bagieu M' 'Guitel J' 'Tordjman I' _journal_name_full 'Zeitschrift fur Kristallographie' _journal_volume 169 _journal_year 1984 _journal_page_first 73 _journal_page_last 82 _publ_section_title ; Crystal data and crystal structure of barium-lithium polyphosphate Ba2Li3(PO3)7 _cod_database_code 1008944 ; _database_code_amcsd 0016808 _chemical_formula_sum 'Ba2 P7 O21 Li3' _cell_length_a 18.01399 _cell_length_b 8.535 _cell_length_c 11.584 _cell_angle_alpha 90 _cell_angle_beta 104.48 _cell_angle_gamma 90 _cell_volume 1724.458 _exptl_crystal_density_diffrn 3.267 _symmetry_space_group_name_H-M 'P 1 21/a 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2-y,z' '1/2-x,1/2+y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z Ba1 0.19763 0.06603 0.03603 Ba2 0.31271 0.05386 0.47231 P1 0.24685 0.43820 0.24490 P2 0.36346 0.16040 0.88190 P3 0.38374 0.39950 0.70600 P4 0.50673 0.37460 0.16180 P5 0.99209 0.36580 0.33330 P6 0.11307 0.39450 0.78480 P7 0.13803 0.14600 0.61840 O1 0.17930 0.05030 0.73610 O2 0.24920 0.34970 0.35590 O3 0.24080 0.36230 0.12860 O4 0.32270 0.05890 0.76600 O5 0.43290 0.08130 0.95050 O6 0.39340 0.30610 0.82130 O7 0.30560 0.21650 0.94160 O8 0.38800 0.29500 0.60630 O9 0.31980 0.50640 0.69420 O10 0.03970 0.99830 0.26140 O11 0.07030 0.20600 0.12470 O12 0.46430 0.26810 0.23270 O13 0.44610 0.44880 0.06710 O14 0.46690 0.98150 0.25390 O15 0.44480 0.15760 0.41940 O16 0.07680 0.37030 0.37600 O17 0.09970 0.28380 0.67130 O18 0.11150 0.29920 0.89010 O19 0.32280 -0.00060 0.21710 O20 0.19570 0.20270 0.55830 O21 0.07110 0.05640 0.54830 Li1 0.46130 0.35500 0.51400 Li2 0.15600 0.22800 0.36500 Li3 0.04450 0.36500 -0.00400