data_global _chemical_name_mineral 'Steklite' loop_ _publ_author_name 'Vegard L' 'Maurstad A' _journal_name_full 'Skrifter utgitt av det Norske Videnskaps-Akademi i Oslo' _journal_volume 1928 _journal_year 1928 _journal_page_first 1 _journal_page_last 24 _publ_section_title ; Die Kristallstruktur der wasserfreien Alaune R'R'''(SO4)2 _cod_database_code 1011235 ; _database_code_amcsd 0018101 _chemical_formula_sum 'K Al S2 O8' _cell_length_a 4.706 _cell_length_b 4.706 _cell_length_c 7.96 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 152.668 _exptl_crystal_density_diffrn 2.808 _symmetry_space_group_name_H-M 'P 3 2 1' loop_ _space_group_symop_operation_xyz 'x,y,z' 'y,x,-z' '-y,x-y,z' '-x,-x+y,-z' '-x+y,-x,z' 'x-y,-y,-z' loop_ _atom_site_label _atom_site_fract_x _atom_site_fract_y _atom_site_fract_z K 0.00000 0.00000 0.00000 Al 0.00000 0.00000 0.50000 S 0.33333 0.66667 0.22200 O1 0.33333 0.66667 0.01600 O2 0.32800 0.34400 0.31700