data_global _chemical_name_mineral 'Kamchatkite' loop_ _publ_author_name 'Varaksina T V' 'Fundamensky V S' 'Filatov S K' 'Vergasova L P' _journal_name_full 'Mineralogical Magazine' _journal_volume 54 _journal_year 1990 _journal_page_first 613 _journal_page_last 616 _publ_section_title ; The crystal structure of kamchatkite, a new naturally occuring oxychloride sulphate of potassium and copper ; _database_code_amcsd 0014493 _chemical_compound_source 'Tolbachik Main Fracture eruption, Kamchatka, Russia' _chemical_formula_sum 'K Cu3 S2 O9 Cl' _cell_length_a 9.741 _cell_length_b 12.858 _cell_length_c 7.001 _cell_angle_alpha 90 _cell_angle_beta 90 _cell_angle_gamma 90 _cell_volume 876.874 _exptl_crystal_density_diffrn 3.585 _symmetry_space_group_name_H-M 'P n a 21' loop_ _space_group_symop_operation_xyz 'x,y,z' '1/2+x,1/2-y,z' '1/2-x,1/2+y,1/2+z' '-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 0.13460 0.57450 0.84720 0.02774 Cu1 0.15200 0.14914 0.83630 0.01229 Cu2 0.22210 0.90739 0.83530 0.01203 Cu3 -0.00120 -0.00090 0.08110 0.01115 S1 0.16940 0.85420 0.33940 0.01026 S2 0.07100 0.20970 0.33530 0.01165 O1 0.17590 0.92500 0.50690 0.01267 O2 0.04550 0.79070 0.31880 0.01305 O3 0.20650 0.29300 0.84230 0.01672 O4 0.17220 0.92210 0.16450 0.02153 O5 0.07930 0.78880 0.84580 0.01393 O6 0.12870 0.15690 0.49910 0.02026 O7 0.11540 0.32110 0.35090 0.01710 O8 0.11710 0.15400 0.16230 0.01140 O9 0.07970 0.01010 0.82270 0.00887 Cl 0.13440 0.55860 0.33960 0.02128