data_global _chemical_name_mineral 'Kanemite' loop_ _publ_author_name 'Garvie L A J' 'Devouard B' 'Groy T L' 'Camara F' 'Buseck P R' _journal_name_full 'American Mineralogist' _journal_volume 84 _journal_year 1999 _journal_page_first 1170 _journal_page_last 1175 _publ_section_title ; Crystal structure of kanemite, NaHSi2O5.3H2O, from the Aris phonolite, Namibia ; _database_code_amcsd 0002274 _chemical_formula_sum 'Si2 Na O8 H8' _cell_length_a 4.946 _cell_length_b 20.502 _cell_length_c 7.275 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 737.706 _exptl_crystal_density_diffrn 1.938 _symmetry_space_group_name_H-M 'P b c n' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x,-y,1/2+z' '-x,y,1/2-z' '1/2-x,1/2+y,z' '1/2+x,1/2-y,-z' '1/2+x,1/2+y,1/2-z' '1/2-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 Si 0.04970 0.29250 0.03910 ? Na 0.50000 0.51150 -0.25000 ? O1 0.00000 0.31280 0.25000 ? O2 0.00420 0.35710 -0.07900 ? O3 -0.14380 0.23260 -0.01810 ? O4 0.48760 0.57540 0.02670 ? O5 0.00000 0.54110 -0.25000 ? H2A 0.01930 0.37950 -0.19890 0.03600 H4A 0.64500 0.40200 -0.05100 0.06500 H4B 0.36400 0.40600 -0.04300 0.08500 H5A 0.00670 0.50710 -0.33470 0.17000 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 Si 0.00100 0.00180 0.00110 0.00000 0.00010 0.00020 Na 0.00340 0.00290 0.00250 0.00000 0.00000 0.00000 O1 0.00330 0.00420 0.00140 0.00000 0.00040 0.00000 O2 0.00310 0.00230 0.00140 0.00030 0.00000 0.00030 O3 0.00110 0.00250 0.00430 -0.00080 -0.00010 -0.00010 O4 0.00370 0.00230 0.00390 -0.00020 0.00010 -0.00010 O5 0.00290 0.00600 0.01110 0.00000 0.00030 0.00000