data_global _amcsd_formula_title 'K1.33Na.67Si2O5' loop_ _publ_author_name 'Spek A L' 'Jong B H W S' _journal_name_full 'Acta Crystallographica, Section E' _journal_volume 61 _journal_year 2005 _journal_page_first i188 _journal_page_last i190 _publ_section_title ; Potassium sodium phyllosilicate, K1.33Na0.67Si2O6 ; _database_code_amcsd 0010457 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'K4 Na2 Si6 O15' _cell_length_a 19.6816 _cell_length_b 7.2656 _cell_length_c 12.5710 _cell_angle_alpha 90 _cell_angle_beta 117.820 _cell_angle_gamma 90 _cell_volume 1589.862 _exptl_crystal_density_diffrn 2.552 _symmetry_space_group_name_H-M 'C 1 2/c 1' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2+y,z' 'x,-y,1/2+z' '1/2+x,1/2-y,1/2+z' '-x,y,1/2-z' '1/2-x,1/2+y,1/2-z' '-x,-y,-z' '1/2-x,1/2-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv K1 0.06258 0.62740 0.16520 0.02930 K2 0.25138 0.32400 0.33695 0.02460 Na 0.08060 0.08640 0.09417 0.02090 Si1 0.15093 0.39500 0.00188 0.00830 Si2 0.06654 0.74600 -0.11486 0.00850 Si3 0.32560 0.45080 0.11444 0.01310 O11 0.14300 0.39360 0.11960 0.02190 O12 0.23400 0.46470 0.01700 0.01620 O13 0.13490 0.18990 -0.05840 0.01810 O14 0.08700 0.52500 -0.10610 0.01140 O21 0.04250 0.81370 -0.02030 0.03030 O22 0.14410 0.84500 -0.10070 0.03380 O23 0.00000 0.77460 -0.25000 0.03050 O31 0.34180 0.40680 0.24480 0.03110 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 K1 0.02910 0.02600 0.02410 -0.00360 0.00520 0.00520 K2 0.03250 0.03250 0.01250 0.00870 0.01360 0.00840 Na 0.02240 0.01630 0.01380 -0.00390 0.00000 0.00420 Si1 0.00970 0.00670 0.00700 -0.00080 0.00270 0.00110 Si2 0.00940 0.00730 0.00510 -0.00100 0.00030 0.00020 Si3 0.00970 0.00750 0.01800 -0.00080 0.00300 -0.00260 O11 0.02600 0.02700 0.01500 0.00500 0.01160 0.00520 O12 0.01400 0.01200 0.02000 -0.00150 0.00570 0.00820 O13 0.01600 0.01100 0.02800 -0.00300 0.01090 -0.00730 O14 0.01370 0.00850 0.00780 -0.00160 0.00140 0.00050 O21 0.06000 0.02300 0.02200 0.01700 0.03100 0.00900 O22 0.01700 0.01000 0.07400 -0.00420 0.02100 -0.00900 O23 0.03900 0.01200 0.01200 0.00000 -0.01200 0.00000 O31 0.01800 0.05600 0.01100 -0.00700 -0.00030 -0.00800