data_global _chemical_name_mineral 'Steklite' loop_ _publ_author_name 'Murashko M N' 'Pekov I V' 'Krivovichev S V' 'Chernyatyeava A P' 'Yapaskurt V O' 'Zadov A E' 'Zelensky M E' _journal_name_full 'Zapiski Rossiiskogo Mineralogicheskogo Obshchetstva' _journal_volume 141 _journal_year 2012 _journal_page_first 36 _journal_page_last 44 _publ_section_title ; Steklite, KAl(SO4)2: the find at Tolbachik volcano (Kamchatka, Russia). Validation as a mineral species and crystal structure ; _database_code_amcsd 0020037 _chemical_compound_source 'Tolbachik volcano, Kamchatka, Russia' _chemical_formula_sum 'K (Al.89 Fe.11) S2 O8' _cell_length_a 4.7281 _cell_length_b 4.7281 _cell_length_c 7.9936 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 120 _cell_volume 154.756 _exptl_crystal_density_diffrn 2.805 _symmetry_space_group_name_H-M 'P 3 1 2' loop_ _space_group_symop_operation_xyz 'x,y,z' '-x+y,y,-z' '-y,x-y,z' '-y,-x,-z' '-x+y,-x,z' 'x,x-y,-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 0.50000 1.00000 0.02250 Al 0.00000 0.00000 0.00000 0.89000 0.00820 Fe 0.00000 0.00000 0.00000 0.11000 0.00820 S 0.66667 0.33333 0.79630 1.00000 0.00850 O1 0.66667 0.33333 0.61520 1.00000 0.01780 O2 0.34870 0.27820 0.85920 1.00000 0.01380