data_global _amcsd_formula_title 'KNa3SrSi8O19*4.3H2O' loop_ _publ_author_name 'Cadoni M' 'Ferraris G' _journal_name_full 'European Journal of Mineralogy' _journal_volume 21 _journal_year 2009 _journal_page_first 485 _journal_page_last 493 _publ_section_title ; Two new members of the rhodesite mero-plesiotype series close to delhayelite and hydrodelhayelite: synthesis and crystal structure Note: Sample TRO4 Note: cell parameters, occupancy and positional parameters corrected by author ; _database_code_amcsd 0007279 _chemical_formula_sum 'Na3 Sr K Si8 O23.28 H8.56' _cell_length_a 6.6599 _cell_length_b 23.7225 _cell_length_c 7.0225 _cell_angle_alpha 90 _cell_angle_beta 91.81 _cell_angle_gamma 90 _cell_volume 1108.928 _exptl_crystal_density_diffrn 2.400 _symmetry_space_group_name_H-M 'P 1 21/m 1' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,1/2-y,z' '-x,1/2+y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_occupancy _atom_site_U_iso_or_equiv Na1 0.01700 0.50580 0.74230 1.00000 0.02600 Na2 0.50000 0.50000 0.00000 1.00000 0.01800 Sr 0.50000 0.50000 0.50000 1.00000 0.00800 K 0.59470 0.75000 0.00660 1.00000 0.03300 Si1 0.47750 0.68330 0.49750 1.00000 0.00600 Si2 0.27030 0.38520 0.77480 1.00000 0.00700 Si3 0.08650 0.61680 0.51140 1.00000 0.00800 Si4 0.25960 0.38480 0.21070 1.00000 0.00700 O1 0.24740 0.66850 0.53400 1.00000 0.01500 O2 0.49630 0.75000 0.46690 1.00000 0.01700 O3 0.61820 0.66630 0.67830 1.00000 0.01700 O4 0.54550 0.65330 0.30480 1.00000 0.01500 O5 0.30770 0.45010 0.75320 1.00000 0.01300 O6 0.24430 0.36240 -0.00840 1.00000 0.01000 O7 0.07000 0.36200 0.65740 1.00000 0.01200 O8 0.18000 0.55710 0.46810 1.00000 0.01600 O9 -0.02880 0.61730 0.71420 1.00000 0.01600 O10 0.34590 0.44570 0.23800 1.00000 0.02000 Wat1A 0.23600 0.68280 0.97000 0.32000 0.03900 Wat1B 0.23200 0.73200 0.90800 0.17000 0.05500 Wat1C 0.23000 0.70800 0.94600 0.15000 0.03700 Wat2 0.96100 0.75000 0.20420 1.00000 0.03700 Wat3 0.19540 0.56160 0.04850 1.00000 0.03300