data_global _amcsd_formula_title 'Na6 O19 Si8' loop_ _publ_author_name 'Kruger H' 'Kahlenberg V' 'Kaindl R' _journal_name_full 'Solid State Sciences' _journal_volume 7 _journal_year 2005 _journal_page_first 1390 _journal_page_last 1396 _publ_section_title ; Structural studies on Na6Si8O19 - a monophyllosilicate with a new type of layered silicate anion _cod_database_code 1101079 ; _database_code_amcsd 0018284 _chemical_formula_sum 'Si8 Na6 O19' _cell_length_a 4.9038 _cell_length_b 23.481 _cell_length_c 15.392 _cell_angle_alpha 90.00 _cell_angle_beta 90.140 _cell_angle_gamma 90.00 _cell_volume 1772.324 _exptl_crystal_density_diffrn 2.498 _symmetry_space_group_name_H-M 'P 21/c' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2-y,1/2+z' '-x,1/2+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_U_iso_or_equiv Si1 0.20170 0.19407 -0.36169 0.01580 Si2 0.80470 0.13559 -0.08868 0.01610 Si3 -0.20910 -0.00669 -0.35632 0.01550 Si4 -0.80270 -0.15861 -0.32271 0.01560 Si5 -0.69960 0.06614 -0.32601 0.01540 Si6 0.30250 0.06179 -0.12038 0.01530 Si7 0.70390 0.21609 -0.24782 0.01540 Si8 -0.30250 -0.10513 -0.23390 0.01580 Na1 -0.26490 -0.13877 -0.45721 0.02370 Na2 0.26410 0.18015 0.03201 0.02270 Na3 0.23760 -0.09973 -0.10507 0.02440 Na4 -0.74030 -0.05027 -0.47259 0.02390 Na5 0.73960 0.27056 0.00744 0.02570 Na6 0.76550 -0.01678 -0.07289 0.02350 O1 -0.39030 0.05230 -0.35520 0.02130 O2 0.89050 0.21140 -0.33390 0.02060 O3 -0.89260 0.01450 -0.35980 0.02180 O4 -0.26660 -0.04210 -0.44120 0.02210 O5 -0.72880 0.07100 -0.22380 0.02530 O6 0.21260 0.12460 -0.37270 0.02150 O7 0.27140 0.27820 0.04760 0.02010 O8 0.11600 0.11200 -0.07620 0.01930 O9 -0.11920 -0.14550 -0.29790 0.02200 O10 0.39210 0.21170 -0.27980 0.02350 O11 -0.26120 -0.03920 -0.26500 0.02300 O12 -0.62160 -0.12200 -0.25280 0.02430 O13 -0.24260 -0.10910 -0.13280 0.02110 O14 0.61700 0.07740 -0.09330 0.02060 O15 0.73630 0.17380 -0.00720 0.02080 O16 -0.74890 -0.14524 -0.42130 0.02010 O17 0.23870 0.00032 -0.08380 0.02100 O18 0.77680 0.16500 -0.18330 0.02600 O19 -0.74960 -0.22570 -0.30320 0.02800 loop_ _atom_site_aniso_label _atom_site_aniso_U_11 _atom_site_aniso_U_22 _atom_site_aniso_U_33 _atom_site_aniso_U_12 _atom_site_aniso_U_13 _atom_site_aniso_U_23 Si1 0.01460 0.01150 0.02150 0.00050 -0.00020 0.00120 Si2 0.01570 0.01190 0.02060 0.00120 -0.00050 -0.00020 Si3 0.01440 0.01010 0.02200 0.00090 0.00000 0.00120 Si4 0.01580 0.00970 0.02140 0.00020 0.00000 0.00030 Si5 0.01530 0.01020 0.02060 0.00070 0.00080 0.00130 Si6 0.01490 0.01070 0.02030 -0.00080 -0.00070 -0.00040 Si7 0.01430 0.01040 0.02150 0.00070 -0.00040 -0.00080 Si8 0.01500 0.01310 0.01920 -0.00010 0.00010 -0.00080 Na1 0.02350 0.01970 0.02780 0.00090 -0.00180 -0.00240 Na2 0.02400 0.01380 0.03040 0.00010 -0.00320 -0.00010 Na3 0.02220 0.02000 0.03110 0.00090 0.00040 0.00040 Na4 0.02380 0.01970 0.02820 0.00020 -0.00130 0.00240 Na5 0.02620 0.01530 0.03570 -0.00130 0.00170 -0.00070 Na6 0.02040 0.01480 0.03520 0.00120 -0.00220 -0.00140 O1 0.01700 0.01600 0.03100 -0.00050 0.00100 0.00200 O2 0.01500 0.02400 0.02300 -0.00100 -0.00070 0.00300 O3 0.01600 0.01700 0.03200 -0.00050 0.00000 0.00000 O4 0.02200 0.01800 0.02600 -0.00300 0.00300 -0.00400 O5 0.03000 0.02400 0.02200 -0.00100 0.00200 -0.00200 O6 0.02500 0.01300 0.02600 0.00200 -0.00300 0.00300 O7 0.02200 0.01600 0.02200 0.00050 0.00400 -0.00050 O8 0.01600 0.01600 0.02600 -0.00040 0.00100 -0.00480 O9 0.01800 0.01600 0.03100 -0.00200 -0.00100 -0.00400 O10 0.01700 0.02800 0.02500 -0.00200 0.00000 -0.00600 O11 0.02300 0.01900 0.02700 0.00000 0.00300 0.00300 O12 0.01600 0.03300 0.02400 -0.00200 0.00100 -0.00700 O13 0.02100 0.01600 0.02600 -0.00100 -0.00200 -0.00110 O14 0.01700 0.01500 0.03000 0.00040 -0.00200 0.00060 O15 0.02200 0.01600 0.02500 0.00330 0.00300 -0.00300 O16 0.02300 0.01100 0.02600 0.00430 0.00000 -0.00220 O17 0.02100 0.01200 0.03000 -0.00310 -0.00200 0.00010 O18 0.02800 0.02300 0.02700 0.00200 -0.00100 0.00400 O19 0.02800 0.02100 0.03500 0.00200 -0.00100 0.00600