data_global _chemical_name_mineral 'Kalsilite' loop_ _publ_author_name 'Andou Y' 'Kawahara A' _journal_name_full 'Mineralogical Journal' _journal_volume 12 _journal_year 1984 _journal_page_first 153 _journal_page_last 161 _publ_section_title ; The refinement of the structure of synthetic kalsilite ; _database_code_amcsd 0014424 _chemical_compound_source 'Synthetic' _chemical_formula_sum 'K Al Si O4' _cell_length_a 5.151 _cell_length_b 5.151 _cell_length_c 8.690 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 199.679 _exptl_crystal_density_diffrn 2.631 _symmetry_space_group_name_H-M 'P 63' loop_ _space_group_symop_operation_xyz 'x,y,z' 'x-y,x,1/2+z' '-y,x-y,z' '-x,-y,1/2+z' '-x+y,-x,z' 'y,-x+y,1/2+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 K 0.00000 0.00000 0.25000 1.00000 0.01583 Al 0.33333 0.66667 0.05400 1.00000 0.00937 Si 0.33333 0.66667 0.43600 1.00000 0.00570 O1 0.61000 0.00500 0.99300 1.00000 0.01773 O2 0.35000 0.71300 0.25200 0.33333 0.01267