data_global _amcsd_formula_title 'K2AlF5' loop_ _publ_author_name 'de Kozak A' 'Gredin P' 'Pierrard A' 'Renaudin J' _journal_name_full 'Journal of Fluorine Chemistry' _journal_volume 77 _journal_year 1996 _journal_page_first 39 _journal_page_last 44 _publ_section_title ; The crystal structure of a new form of the dipotassium pentafluoroaluminate hydrate, K2AlF5*(H2O), and of its dehydrate, K2AlF5 _cod_database_code 1000479 ; _database_code_amcsd 0013026 _chemical_formula_sum 'K2 Al F5' _cell_length_a 5.965 _cell_length_b 5.965 _cell_length_c 3.699 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 131.615 _exptl_crystal_density_diffrn 2.525 _symmetry_space_group_name_H-M 'P 4/m m m' loop_ _space_group_symop_operation_xyz 'x,y,z' '-y,-x,z' 'y,x,-z' 'y,-x,-z' '-y,x,z' 'x,-y,z' '-x,y,-z' 'x,y,-z' '-x,-y,z' 'y,x,z' '-y,-x,-z' '-y,x,-z' 'y,-x,z' '-x,y,z' 'x,-y,-z' '-x,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z K1 0.00000 0.50000 0.50000 Al1 0.00000 0.00000 0.00000 F1 0.00000 0.00000 0.50000 F2 0.21900 0.21900 0.00000