data_global _amcsd_formula_title '(H2O)2KAlF6' loop_ _publ_author_name 'Frenzen G' 'Massa W' _journal_name_full 'Acta Crystallographica, Section C' _journal_volume 46 _journal_year 1990 _journal_page_first 190 _journal_page_last 192 _publ_section_title ; Kalium-dioxonium-hexafluoroaluminat ; _database_code_amcsd 0010099 _chemical_formula_sum 'K Al F6 O2 H6' _cell_length_a 8.6464 _cell_length_b 8.6464 _cell_length_c 8.6464 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 646.407 _exptl_crystal_density_diffrn 2.241 _symmetry_space_group_name_H-M 'P a 3' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+z,x,1/2-y' 'z,1/2-x,1/2+y' '1/2-z,1/2+x,y' '-z,-x,-y' '1/2+y,1/2-z,-x' '1/2-y,-z,1/2+x' '-y,1/2+z,1/2-x' 'y,z,x' 'x,1/2-y,1/2+z' '1/2-x,1/2+y,z' '1/2+x,y,1/2-z' '-x,-y,-z' '1/2-z,-x,1/2+y' '-z,1/2+x,1/2-y' '1/2+z,1/2-x,-y' 'z,x,y' '1/2-y,1/2+z,x' '1/2+y,z,1/2-x' 'y,1/2-z,1/2+x' '-y,-z,-x' '-x,1/2+y,1/2-z' '1/2+x,1/2-y,-z' '1/2-x,-y,1/2+z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z _atom_site_U_iso_or_equiv K 0.00000 0.00000 0.00000 ? Al 0.50000 0.00000 0.00000 ? F 0.43990 0.19460 0.04880 ? O 0.19710 0.19710 0.19710 ? H 0.29200 0.20500 0.15100 0.06500 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 K 0.02020 0.02020 0.02020 0.00230 0.00230 0.00230 Al 0.01230 0.01230 0.01230 -0.00410 -0.00410 -0.00410 F 0.02210 0.01420 0.02640 0.00070 0.00660 -0.00230 O 0.02500 0.02500 0.02500 0.00930 0.00930 0.00930